I'm seeking information on the great great grandparents of:

ROBERT HARDMAN WERTZ
b. 6 May 1914 in Los Angeles County, CA
d. 15 Aug 1983 in Santa Cruz County, CA.

Parents: Raphael Hardman Wertz & Loretta Reba Vanvleet or Van Fleet daughter of Fred H. Vanvleet or Van Fleet & Eva H. Maidenname Unknown

Grandparents: Hiram M. Wertz & Edith Hardman daughter of Wilford V. Hardman & Mary Minerva Maidenname Unknown

G. Grandparents: Robert F. Wertz & Mary Robb
G.G. Grandparents: What are their names??

Any help with this family would be appreciated.

Regards,
A Wertz reseacher from Westmoreland County & Bedford County., Pennsylvania