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AgeFromName 0.0.8

A tool for predicting someone's age, gender, or generation given their name and assigned sex at birth, assuming they were born in the US.

Feel free to use the Gitter community for help or to discuss the project.


$ pip install agefromname


This more or less apes the approach of FiveThirtyEight's "How to Tell if Someone's Age When All you Know Is Her Name" article.

It includes data collected scraped from the Social Security Administration's Life Tables for the United States Social Security Area 1900-2100 and their baby names data. Code is included to re-scrape and refresh this data in It includes data as far back as 1981.

To use, first initialize the finder

>>> from agefromname import AgeFromName
>>> age_from_name = AgeFromName()

You find the probability of someone's gender based on their first name and optionally, the current year, their minimum age, and/or their maximum age.

>>> age_from_name.prob_male('taylor')
>>> age_from_name.prob_female('taylor')
>>> age_from_name.prob_male('taylor', minimum_age=50)
>>> age_from_name.prob_male('taylor', current_year=1930)
>>> age_from_name.prob_male('taylor', current_year=2010, minimum_age=30)
>>> age_from_name.prob_male('taylor', current_year=2010, minimum_age=30, maximum_age=40)

You can even plot the plot, given a current year, the probability someone named Kelsey would be female:

>>> (pd.DataFrame([{'year': year, 
                'P(Male)': age_from_name.prob_male('kelsey', current_year=year)}
               for year in range(1930, 2015)])

The decreasing probability Kelsey is a male

One can perform this computation in bulk for all names. Here, we can see a 95% confidence intervals of how likely people over 18 in 1993 were females given their names:

>>> age_from_name.get_all_name_female_prob(current_year=1993, minimum_age=18).iloc[:3]
                  hi        lo  prob
aage        0.648197  0.000000   0.0
aagot       1.000000  0.380786   1.0
aamir       0.398189  0.000000   0.0

Now you can use this to get the mode of someone's age, give their first name and gender. Note that their gender should be a single letter, 'm' or 'f' (case-insensitive), and that the first name is case-insensitive as well.

>>> age_from_name.argmax('jAsOn', 'm')
>>> age_from_name.argmax('Jason', 'M')

You can also include an "as-of" year. For example, in 1980, the argmax year for "John" was 1947, while in 2000 it was 1964. Note that if omitted, the current year is used.

>>> age_from_name.argmax('john', 'm', 2000)
>>> age_from_name.argmax('john', 'm', 1980)

Furthermore, you can exclude people who are younger than a particular age.

>>> age_from_name.argmax('bill', 'm', 1980, minimum_age=40)
>>> age_from_name.argmax('bill', 'm', minimum_age=40)

Getting estimated counts of living people with a giving name and gender at a particular date is easy, and given in a Pandas Series.

>>> age_from_name.get_estimated_counts('john', 'm', 1960)
1881     4613.792420
1882     5028.397099
1883     4679.560929

We can see corresponding probability distribution using

>>> age_from_name.get_estimated_distribution('mary', 'f', 1910)
1881    0.016531
1882    0.019468
1883    0.019143

Finally, we can see similar information for generations, as well, using the GenerationFromName class.

>>> from agefromname import GenerationFromName
>>> generation_from_name = GenerationFromName()
>>> generation_from_name.argmax('barack', 'm')
'Generation Z'
>>> generation_from_name.argmax('ashley', 'f')
>>> generation_from_name.argmax('monica', 'f')
'Generation X'
>>> generation_from_name.argmax('bill', 'm')
'Baby Boomers
>>> generation_from_name.argmax('wilma', 'f')
>>> generation_from_name.get_estimated_distribution('jaden', 'm')
Baby Boomers           0.000000
Generation X           0.001044
Generation Z           0.897662
Greatest Generation    0.000000
Millenials             0.101294
_other                 0.000000
Name: estimate_percentage, dtype: float64
>>> generation_from_name.get_estimated_distribution('gertrude', 'f')
Baby Boomers           0.259619
Generation X           0.031956
Generation Z           0.009742
Greatest Generation    0.425293
Millenials             0.011412
_other                 0.261979
>>> generation_from_name.get_estimated_counts('ashley', 'f')
Baby Boomers              702.481287
Generation X            29274.206090
Generation Z           141195.016621
Greatest Generation        34.998913
Millenials             652914.233604
_other                      0.102625
Name: estimated_count, dtype: float64

Caveat Usor

The Social Security Administration records the 1,000 most common male and female baby names + birth counts each year. These may not be fully representative of the entire population, and may not work as well for people whose names aren't historically common among those born in the US or other groups.

Be aware that there are people who have near-dogmatic objections to this sort of analysis, especially using a first name to impute a gender.