William Morgan Allen parents are listed one household down from him in the 1920 CA Tulare Co. Orosi Twsp census. They are also in the 1900 census in Alila Twsp, Tulare Co. CA and are in Malaka Twsp, Jasper Co. Iowa in 1880 census.
Father- George E. Allen b. Jan 1851 in IL, died May 21, 1921 Tulare Co. CA age 70 (born in Illinois from censuses) Mother- Margaret R. Morgan b. Nov. 1853 d. Feb 22, 1927 Tulare Co. age 74 (born in Scotland from censuses)
William's wife: Rhoba G. Ward -family in 1900 Orosi Tulare Co. CA census: Ancestry's index has listed as Rhoda Ward, but looking at image the written is Rhoba b. Mar 1881 CA father: Harvey L. Ward b. Dec 1851 in MI, mother Martha E. Ward b. Sept 1856 in CA. plus 2 younger brothers, Arthur T and Henry H.
CA birth index has Francis W. Williams b. March 14, 1906 in Alameda Co. mother's maiden name: Ward.
Birth months and yrs I got from 1900 censuses. Death dates I found at Vital Search- www.vitalsearch-ca.com for George and Margaret Allen.
In 1920 census William has mother born in PA but in 1930 he has mother born in Scotland. Haven't found him yet in 1900 census. Has a sister Mabel B. living with parents 1900 and a sister Jennie in 1880 census.
There is only one other Williams male chld born in CA that uses the initalis F and W. for the yrs 1905 to 1908-a Ferris W. Williams b. Tulare Co. 1907 - but he is in 1930 census as a boarder living in Visalia, Tulare Co. CA. leaving only Francis W. I then did a seach of Ward females born 1881 +/- 2 yrs inCA 1900 census and saw the Rhoda in Orosi,Tulare Co. and it turned out to be Rhoba.
Contact me directly if you you need any more details from censuses.