This name is popular in Indonesia, especially among Chinese ethnic people like me. I know more than 10 boys called Kevin. I like the name, but wouldn't name my son this because it's overused here.
In 2018, 47 is the most common age for an American (U.S.) Kevin who is registered male with the Social Security Administration. It is the 26th most common male first name for living U.S. citizens.
Under the influence of American tv series, this name became so common a decade (or 2) ago in France, that it nearly became a joke. So it's now both common and associated with many annoying boys. It does'nt carry the same connotations when held by an American, though.
https://www.behindthename.com/name/kevin/top/poland?compare=Kewin&type=sample
https://dane.gov.pl/pl/dataset/1667,lista-imion-wystepujacych-w-rejestrze-pesel-osoby-zyjace/resource/54115/table?page=1&per_page=20&q=Kevin&sort=