In 2018, 87 is the most common age for an American (U.S.) Maud who is registered female with the Social Security Administration. It is the 6, 669th most common female first name for living U.S. citizens.
― Anonymous User 10/5/2018
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Maud is also used in France. Here it's probably more common among young women than old women. (The spelling Maude is used in France too.) [noted -ed]
Sources: https://en.m.wikipedia.org/wiki/Maud_(given_name)
https://forebears.io/forenames/maud