From third party research, Jacob H.-5 Firestone (April 16, 1845 Nov. 5, 1936, Spencer) is the son of David Roller-4 Firestone (John F.-3, Mathias-2, Nicholas-1) and wife Elizabeth, dau. Christain and Charlotte (Hine) Rice. Continuing, Jacob married Adaline Piper on 11 May 1872. One child said b. 23 Mar 1891, dec'd infant. Four other known surviving children:
....Milan D. Firestone m. Anna Gallatin;
....Ada Firestone, m. Edwin W. Brown;
....John W. Firestone** m. Maude Hyde;
....Asa Firestone m. Myrtle Dorland.

**DOB/D matches those you show for John B. Firestone.

As above, Milan D(avid) Firestone m. Anna Gallatin had: Melvin O(rien) Firestone b. 14 Oct 1895 m. Ina Akin

I'll do a little more research to see if I can connect more of the dots. Let me know if you would like the more information about ancestry of these fine folk or if you have found information in conflict. --GeneJ