Grandma Betty is already a relic, but Grandpa James will still be around 70 years from today.

When the 1940 Census was made public for the first time in April, it generated immense interest. Genealogy website recently crunched the data to see how the popularity of names has changed.

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In 1940, the most popular baby names were Mary and James. In 2010, Mary fell to 109th place, while James was still a strong choice at No. 19. The biggest fall in popularity for girls' names was Betty, No. 5 in 1940 but not in the top 1,000 in 2010. Biggest fall among boys' names was Donald, going from No. 9 in 1940 to No. 377 in 2010.

And if you recently had a grandchild, there's a good chance you welcomed to the family Jacob or Isabella, the most popular boys' and girls' names in 2010.