When Mordecai Menahem Kaplan was born on 11 June 1881, his father, Israel Kaplan, was 26 and his mother, Anna Kowarsky, was 22. He married Lena Rubin on 2 June 1908. They were the parents of at least 4 daughters. He lived in Atlantic City, Atlantic, New Jersey, United States in 1930 and Manhattan, New York City, New York, United States for about 5 years. He died on 8 November 1983, at the age of 102, and was buried in Babylon, Suffolk, New York, United States.
Some characteristic forenames: Jewish Meyer, Hyman, Isadore, Emanuel, Yitzchok, Ari, Morty, Yakov, Batya, Binyomin.
Jewish (Ashkenazic): surname sometimes used as a translation of Cohen , from German Kaplan or Polish kapłan ‘chaplain, curate’.
German, Swedish, Czech, Slovenian, and Croatian; Slovak (Kaplán); Polish (Kapłan); Hungarian (Káplán): status name for a deacon, chaplain, or curate, ultimately from Late Latin capellanus (see Chaplin 1), or a nickname for someone resembling a clergyman.