The father of these gentlemen was Mr Jacob Feltman.
The main thing to remember is that the census takers spelled the Feltman name differently. They have the name spelled Felpman in the 1860 census.However, in the 1850 census it is spelled Felpmon and in the 1830's it is spelled Feltman.
1860 Census County: Fayette July 7, 1860 pg 67
Yes, they were brothers see the 1860 Census for 1860; Census Place: Eastern Division, Fayette, Alabama; Roll: M653_9; Page: 411; Image: 416.
Jacob Felpman 60 Elvina Felpman 46 Isham B Felpman 19 Benj F Felpman 17 L E Felpman 14 Margret Felpman 12 Helan c Felpman 7 Samual D Felpman 3
1850 Census County: Walker October 25, 1850 Jacob Felpmon 50 Farmer South Carolina Elvery 57 Georgia Spencer 18 Alabama Martha 17 Alabama Milinda 14 Alabama Rhoda 13 Alabama James 11 Alabama Isham 9 Alabama Benjamin 7 Alabama Lovi 4 Alabama Margaret 2 Alabama
The 1830 Census lists only the number of people of a certain age in Jacob Feltman's family and here the name is spelled Feltman.He lived in Tuscaloosa at this point in his life.
Family information is split over two pages in the 1830 census and the last name is spelled Felpmon, but they are the same family.