One article in my series "Sonoma County, California"
Woodland Daily Democrat 15 Oct 1897
[Yolo County was set off from Sonoma in 1850] "William Coombs the first white child born in the county. He was born in January, 1846. The first female white child was born in Washington 21 Feb, and was the daughter of James McDowell and wife."
Phoenix Arizona Republican, 10 Jan 1905
"Judge A Starke, who has just died at San Bernardino, Cal., was the first white child born in Sonoma County, that state"
Dispatch Democrat, 7 Apr 1922
"Wesley Hopper, a brother of Henry Hopper, prominent Ukiah banker, died last Tuesday afternoon in Santa Rosa.... The deceased was the first white child to be born in Sonoma county."
Dispatch Democrat, 2 May 1924
"J S Williams... passed away Tuesday at Healdsburg... first white child to be born in Sonoma county, his birth having occurred on a ranch south of the present site of Healdsburg 14 Dec 1848. His father came to this state about four years before the Donner party. He died while Mr Williams was a child and the latter's mother married a brother of Kit Carson."
http://newspaperarchive.com/dispatch-democrat/1934-05-04/page-6?tag=sonoma+first+white+child&rtserp=tags/sonoma?page=8&pep=first-white-child&psb=relavance
Dispatch Democrat, 4 May 1934
"J S Williams...died Tuesday at Healdsburg....first white child to be born in Sonoma county.
Oakland Tribune, 9 Dec 1943
"Mrs Rose Turner, 91, believed to be the first white child born in Sonoma County, died Tuesday. Her parents came West from Kentucky in the 1849 gold rush"
Long Beach Press Telegram, 23 Jul 1950
"...William S Elliott, was the first white child born in Sonoma County."