In 2018, 28 is the most common age for an American (U.S.) Katharine who is registered female with the Social Security Administration. It is the 1, 076th most common female first name for living U.S. citizens.
― Anonymous User 10/11/2018
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The name Katharine was only given to 106 baby girls born in the US in 2012. I like this spelling a lot.