Hello Linda. Welcome to G2G and WikiTree. Thank you for your interest in both and your question here.
The first link below gives his mother's surname as Morgan - which you may already have. It is not a "great" source and these are not always accurate; especially (as in this case) when the original document is not given. Here it is:
Name: William Tipton
Event Type: Death
Event Date: 03 Nov 1955
Event Place: Kern, California, United States
Birth Date: 06 Apr 1865
Father's Name: Tipton
Mother's Name: Morgan
Citing this Record:
"California, Death Index, 1940-1997," index, <i>FamilySearch</i> (https://familysearch.org/pal:/MM9.1.1/VP2N-4D9 : accessed 19 Aug 2014), William Tipton, 03 Nov 1955; citing Department of Public Health Services, Sacramento.
Unfortunately, Linda, without other details of given name or place, my other searching has turned up too many variables to list here.
Please let us know if there is something more we can do.