Are you interested in both ancestors and descendants?
As TK posted, Caroline Matilda "Ella" Trowbridge died May 1870 in Erie Township, Neosho County, Kansas.
1870 Neosho County, Kansas John W Trowbridge 69 years old Orson 29 years old John 19 years old Winfield Morton 9 years
Find a Grave has memorial for a little girl whose father is John W Trowbridge born August 1853 in PA (so the age is maybe a little off): Maudie E. Trowbridge Birth: Oct. 17, 1880 Death: Jan. 9, 1884 Buried East Hill Cemetery Neosho County, Kansas
This Find a Grave memorial links Maudie to John W. Trowbridge buried in Iola, Allen, Kansas with a wife Florence (Richerson?) children Claude A Trowbridge (born in Neosho County 1883) Zella M Trowbridge Croley (born in Neosho County 1887; died Allen County, Kansas 1930) Eugema Trowbridge Johnson (per Florence obit)
1900 CENSUS Erie, Neosho, Kansas John W. Trowbridge, 36 (b Aug 1853 PA), parents b NY Florence B39 years (b Mar 1861 in Indiana) married 24 years, 5 children of which 4 are still alive. Zella M, 12 (Oct 1887) b Kansas