Charles apparently (one person's version) had 10 siblings, but I only have 3 names:James Edward b.8 Dec 1861, Charles A. b.19Dec 1862, and John C. b. 1867, all born in Cerro Gordo, Ill.
As for Joseph's own 9 siblings, these I know are correct except for one sister, Delia/Martha, whom I cannot confirm.There is one tantalizing suggestion of her existence - the mention of Martha Auten who died in 1855 (see Wolfe letters #1 in ATEN WEBSITE, under "Aten/Auten Letters Link")We can find no other Martha in the whole extended family; perhaps this was the mysterious Delia (the name Delia came from another unconfirmed source).
As for the details of Joseph's siblings, this is a big load of data.Do you want to download the gedcom? or just get the sibs without their families?You can contact me directly at email@example.com if you would like to have the whole thing.Otherwise I will give you the bare bones here: Delia/Martha d 1855 (unconfirmed data); James Wesley b 13 Nov 1809 PA moved to Nebraska (my line); John b 1810 PA; Harriet b 1812; David b 11 Apr 1816 Carroll Co Ohio; Mary C. b 18 Sept 1818 Carroll Co; Abraham A. b 21 Aug 1821 Carroll Co; Nicholas b 10 Jan 1825 Carroll Co; Jacob Sr. b 6 Aug 1826 Carroll Co; and Joseph b 1830 d. Illinois
James Wesley and his extended family moved to Nebraska in 1871; all of his siblings (except Joseph) seem to have stayed on and died in Owen Co. Indiana where the whole extended family of Johnathon Wesley Aten/Auten and Mary Miller moved in about 1850.