German J. & Mary Margaret Smith Coffey

German was one of the sons of Nebuzaradan and Elizabeth Easley Coffey.  He was born in Simpson Co., KY on Nov. 17, 1827 and was married to Mary Margaret on Jul. 6, 1856 in Lane Co., OR.  From at least July, 1860 through death, German and Mary Margaret resided in Marion Co., OR.  German died in 1874 and was buried at Aumsville Cemetery in Marion Co.  Mary Margaret outlived him by nearly 50 years.  She died in 1922 in The Dalles, Wasco Co., OR and is buried at the IOOF cemetery in Salem, Marion Co.

Mary Margaret was born on Feb. 18, 1838 in Abingdon, Knox Co., IL.  Her father was Hiram Smith who married a Miss Rivers.

She and German at at least seven children:  Mary L., born c1844; John Crittenden, born c1857; Denton Darby, born 1859; Edith L., born c1864; Ellen, born c1866; Tecumseh Sherman, born Apr., 1869 and Frank Nebuzaradon, born Dec., 1871, all in Oregon.

Denton Darby married Carrie W. Woodrum [sic], date unknown.  Carrie was born in Sep., 1866 in Nebraska to Elijah Woodrum and his wife Martha.  It is Carrie I am interested in because I find her maiden name a bit questionable:

In the 1870 Mills Co., IA census, Carrie's father's surname was spelled Woodran, and in 1880 Mills Co. IA  she was found in the household with parents whose surname was spelled Woodman, but Carrie's surname is spelled Woodner.  In that census, she appeared with her parents but on the page following her family's enumeration.  In 1900 her parents were found in the Portland, Multnomah Co., OR census, and the surname was spelled Woodrum.  Carrie's mother Martha was a widow in 1920 and enumerated in the household with Carrie and her new husband, Irving Alvard.  Martha's surname was spelled Woodrum.

So, anyone know which is the correct surname?