diff --git a/lib/blocks.php b/lib/blocks.php
index 8b29458e9c9dc..c4f4fb15d0652 100644
--- a/lib/blocks.php
+++ b/lib/blocks.php
@@ -137,7 +137,7 @@ function gutenberg_register_legacy_social_link_blocks() {
 						'type' => 'string',
 					),
 				),
-				'render_callback' => 'gutenberg_render_core_social_link',
+				'render_callback' => 'gutenberg_render_block_core_social_link',
 			)
 		);
 	}
diff --git a/packages/block-library/src/legacy-widget/index.php b/packages/block-library/src/legacy-widget/index.php
index d0a91f3f6c619..39e88c29dc1c3 100644
--- a/packages/block-library/src/legacy-widget/index.php
+++ b/packages/block-library/src/legacy-widget/index.php
@@ -12,7 +12,7 @@
  *
  * @return string Returns the rendered widget as a string.
  */
-function render_widget_by_id( $id ) {
+function block_core_legacy_widget_render_widget_by_id( $id ) {
 	// Code extracted from src/wp-includes/widgets.php dynamic_sidebar function.
 	// Todo: When merging to core extract this part of dynamic_sidebar into its own function.
 	global $wp_registered_widgets;
@@ -71,7 +71,7 @@ function render_widget_by_id( $id ) {
  *
  * @return string Returns the post content with the legacy widget added.
  */
-function render_block_legacy_widget( $attributes ) {
+function render_block_core_legacy_widget( $attributes ) {
 	$id           = null;
 	$widget_class = null;
 	if ( isset( $attributes['id'] ) ) {
@@ -82,7 +82,7 @@ function render_block_legacy_widget( $attributes ) {
 	}
 
 	if ( $id ) {
-		return render_widget_by_id( $id );
+		return block_core_legacy_widget_render_widget_by_id( $id );
 	}
 	if ( ! $widget_class ) {
 		return '';
@@ -121,7 +121,7 @@ function register_block_core_legacy_widget() {
 					'type' => 'object',
 				),
 			),
-			'render_callback' => 'render_block_legacy_widget',
+			'render_callback' => 'render_block_core_legacy_widget',
 		)
 	);
 }
diff --git a/packages/block-library/src/navigation/index.php b/packages/block-library/src/navigation/index.php
index 1e57dd3e02b4c..355aa989701cd 100644
--- a/packages/block-library/src/navigation/index.php
+++ b/packages/block-library/src/navigation/index.php
@@ -12,7 +12,7 @@
  * @param  array $attributes Navigation block attributes.
  * @return array Colors CSS classes and inline styles.
  */
-function core_block_navigation_build_css_colors( $attributes ) {
+function block_core_navigation_build_css_colors( $attributes ) {
 	$colors = array(
 		'css_classes'   => array(),
 		'inline_styles' => '',
@@ -64,7 +64,7 @@ function core_block_navigation_build_css_colors( $attributes ) {
  * @param  array $attributes Navigation block attributes.
  * @return array Font size CSS classes and inline styles.
  */
-function core_block_navigation_build_css_font_sizes( $attributes ) {
+function block_core_navigation_build_css_font_sizes( $attributes ) {
 	// CSS classes.
 	$font_sizes = array(
 		'css_classes'   => array(),
@@ -91,7 +91,7 @@ function core_block_navigation_build_css_font_sizes( $attributes ) {
  * @param array $blocks Navigation link inner blocks from the Navigation block.
  * @return array Blocks that had valid labels
  */
-function core_block_navigation_empty_navigation_links_recursive( $blocks ) {
+function block_core_navigation_empty_navigation_links_recursive( $blocks ) {
 	$blocks = array_filter(
 		$blocks,
 		function( $block ) {
@@ -102,7 +102,7 @@ function( $block ) {
 	if ( ! empty( $blocks ) ) {
 		foreach ( $blocks as $key => $block ) {
 			if ( ! empty( $block['innerBlocks'] ) ) {
-				$blocks[ $key ]['innerBlocks'] = core_block_navigation_empty_navigation_links_recursive( $block['innerBlocks'] );
+				$blocks[ $key ]['innerBlocks'] = block_core_navigation_empty_navigation_links_recursive( $block['innerBlocks'] );
 			}
 		}
 	}
@@ -115,7 +115,7 @@ function( $block ) {
  *
  * @return string
  */
-function core_block_navigation_render_submenu_icon() {
+function block_core_navigation_render_submenu_icon() {
 	return '<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 24 24" transform="rotate(90)"><path d="M8 5v14l11-7z"/><path d="M0 0h24v24H0z" fill="none"/></svg>';
 }
 
@@ -127,13 +127,13 @@ function core_block_navigation_render_submenu_icon() {
  *
  * @return string Returns the post content with the legacy widget added.
  */
-function render_block_navigation( $content, $block ) {
+function render_block_core_navigation( $content, $block ) {
 
 	if ( 'core/navigation' !== $block['blockName'] ) {
 		return $content;
 	}
 
-	$block['innerBlocks'] = core_block_navigation_empty_navigation_links_recursive( $block['innerBlocks'] );
+	$block['innerBlocks'] = block_core_navigation_empty_navigation_links_recursive( $block['innerBlocks'] );
 	$attributes           = $block['attrs'];
 
 	/**
@@ -157,8 +157,8 @@ function render_block_navigation( $content, $block ) {
 		return '';
 	}
 
-	$colors          = core_block_navigation_build_css_colors( $attributes );
-	$font_sizes      = core_block_navigation_build_css_font_sizes( $attributes );
+	$colors          = block_core_navigation_build_css_colors( $attributes );
+	$font_sizes      = block_core_navigation_build_css_font_sizes( $attributes );
 	$classes         = array_merge(
 		$colors['css_classes'],
 		$font_sizes['css_classes'],
@@ -176,7 +176,7 @@ function render_block_navigation( $content, $block ) {
 		'<nav %1$s %2$s>%3$s</nav>',
 		$class_attribute,
 		$style_attribute,
-		core_block_navigation_build_html( $attributes, $block, $colors, $font_sizes, true )
+		block_core_navigation_build_html( $attributes, $block, $colors, $font_sizes, true )
 	);
 }
 
@@ -190,7 +190,7 @@ function render_block_navigation( $content, $block ) {
  *
  * @return string Returns  an HTML list from innerBlocks.
  */
-function core_block_navigation_build_html( $attributes, $block, $colors, $font_sizes ) {
+function block_core_navigation_build_html( $attributes, $block, $colors, $font_sizes ) {
 	$html            = '';
 	$classes         = array_merge(
 		$colors['css_classes'],
@@ -257,14 +257,14 @@ function core_block_navigation_build_html( $attributes, $block, $colors, $font_s
 			) &&
 			$has_submenu
 		) {
-			$html .= '<span class="wp-block-navigation-link__submenu-icon">' . core_block_navigation_render_submenu_icon() . '</span>';
+			$html .= '<span class="wp-block-navigation-link__submenu-icon">' . block_core_navigation_render_submenu_icon() . '</span>';
 		}
 
 		$html .= '</a>';
 		// End anchor tag content.
 
 		if ( $has_submenu ) {
-			$html .= core_block_navigation_build_html( $attributes, $block, $colors, $font_sizes, false );
+			$html .= block_core_navigation_build_html( $attributes, $block, $colors, $font_sizes, false );
 		}
 
 		$html .= '</li>';
@@ -275,7 +275,7 @@ function core_block_navigation_build_html( $attributes, $block, $colors, $font_s
 /**
  * Register the navigation block.
  *
- * @uses render_block_navigation()
+ * @uses render_block_core_navigation()
  * @throws WP_Error An WP_Error exception parsing the block definition.
  */
 function register_block_core_navigation() {
@@ -325,4 +325,4 @@ function register_block_core_navigation() {
 	);
 }
 add_action( 'init', 'register_block_core_navigation' );
-add_filter( 'render_block', 'render_block_navigation', 10, 2 );
+add_filter( 'render_block', 'render_block_core_navigation', 10, 2 );
diff --git a/packages/block-library/src/social-link/index.php b/packages/block-library/src/social-link/index.php
index 20940f389a518..5db4268a5d1e8 100644
--- a/packages/block-library/src/social-link/index.php
+++ b/packages/block-library/src/social-link/index.php
@@ -12,17 +12,17 @@
  *
  * @return string Rendered HTML of the referenced block.
  */
-function render_core_social_link( $attributes ) {
+function render_block_core_social_link( $attributes ) {
 	$service = ( isset( $attributes['service'] ) ) ? $attributes['service'] : 'Icon';
 	$url     = ( isset( $attributes['url'] ) ) ? $attributes['url'] : false;
-	$label   = ( isset( $attributes['label'] ) ) ? $attributes['label'] : __( 'Link to ' ) . core_social_link_get_name( $service );
+	$label   = ( isset( $attributes['label'] ) ) ? $attributes['label'] : __( 'Link to ' ) . block_core_social_link_get_name( $service );
 
 	// Don't render a link if there is no URL set.
 	if ( ! $url ) {
 		return '';
 	}
 
-	$icon = core_social_link_get_icon( $service );
+	$icon = block_core_social_link_get_icon( $service );
 	return '<li class="wp-social-link wp-social-link-' . $service . '"><a href="' . esc_url( $url ) . '" aria-label="' . esc_attr( $label ) . '"> ' . $icon . '</a></li>';
 }
 
@@ -38,7 +38,7 @@ function register_block_core_social_link() {
 		array_merge(
 			$metadata,
 			array(
-				'render_callback' => 'render_core_social_link',
+				'render_callback' => 'render_block_core_social_link',
 			)
 		)
 	);
@@ -53,8 +53,8 @@ function register_block_core_social_link() {
  *
  * @return string SVG Element for site icon.
  */
-function core_social_link_get_icon( $site ) {
-	$sites = core_social_link_sites();
+function block_core_social_link_get_icon( $site ) {
+	$sites = block_core_social_link_sites();
 	if ( isset( $sites[ $site ] ) && isset( $sites[ $site ]['icon'] ) ) {
 		return $sites[ $site ]['icon'];
 	}
@@ -69,8 +69,8 @@ function core_social_link_get_icon( $site ) {
  *
  * @return string Brand label.
  */
-function core_social_link_get_name( $site ) {
-	$sites = core_social_link_sites();
+function block_core_social_link_get_name( $site ) {
+	$sites = block_core_social_link_sites();
 	if ( isset( $sites[ $site ] ) && isset( $sites[ $site ]['name'] ) ) {
 		return $sites[ $site ]['name'];
 	}
@@ -86,7 +86,7 @@ function core_social_link_get_name( $site ) {
  *
  * @return array|string
  */
-function core_social_link_sites( $site = '', $field = '' ) {
+function block_core_social_link_sites( $site = '', $field = '' ) {
 	$sites_data = array(
 		'fivehundredpx' => array(
 			'name' => '500px',