Milton M. Bovard of Philadelphia 1827-1915

I'm interested in knowing where Milton Bovard, b. PA ca 1827 came from.In 1850 he was a marine in Nantuckett, Massachusetts.In 1860, he lived in the 21st Ward of Philadelphia, PA with first wife Sarah Caroline Rhoads and son Milton, as well as younger children named Ellen and Ann Byrnes.
His first wife died in 1875, and he married 2nd Sarah E.(?). He and both wives are buried at Leverington Cemetary in Philadelphia.He died in 1915, and his second wife died in 1921.
His children included Milton,b. ca 1852, Newton b. ca 1854, William b. 1858, Amanda F.b. ca 1856, Byron b. ca 1865, Joseph b. ca1867, Annetta b. 1881, and Sarah L. b. ca1879.It's possible that Newton, and William were children of a relative.
Any information appreciated.
Pamela Lavery