Frank, Etta, Clarence & Harry Jenkins, CA?

Back of photo is written: Frank Jenkins (grandfather), Etta Jenkins (grandmother)
Clarence -father, 15 years 7 days, brother - Harry - 21 yrs 5 mon, 15 days.
Photo found at antique shop (not my family line).

After a little research, I suspect this may be Frank Henry Jenkins and wife, Etta Mae (Ford) Jenkins.
Family settled in Sacramento, California.
People in photo include: Frank Jenkins, Etta Jenkins, Clarence Jenkins, and Harry Jenkins