Clara or Nina Idleman (b. 1860)

Nina/Clara Idleman (b. 28 Sep 1860) married Sidney C. Newcomb (b. 18 Apr 1853, BMN #2097).  B.M. Newcomb said that Sidney married Nina Idleman, born 28 Sep 1860 in Morrow Co. OH, daughter of Amos Hosea Idleman and Sarah Hippard. Nina and her parents are listed in the 1880 census, in Jackson OH, just a few addresses away from Sidney and his first wife. However, all census records shows Sidney's wife's name as Clara P. (In the 1880 census, Nina's middle initial is also P.) Florida records show a marriage for Nina C. Newcomb in Hillsborough County in 1927 (groom's name not found). I'm inclinded to think that Nina's middle name (or nickname) was Clara. But where did the P come from?