On 14 Jul 1875 when John Peak was 39, he married
Mary Louisa Segrave, daughter of
Joseph Day Segrave (26 Jul 1824-7 Feb 1898) &
Rachel Caroline Holbrook (3 Nov 1826-10 Aug 1871), in Crawford County, Ohio.
Born on 11 Nov 1857 in Denison, Crawford County, Iowa. Mary Louisa died in Crawford County, Ohio, on 16 Jun 1885; she was 27.