Edward & Myrtle McNamara

I am looking for information regarding my great grandparents, Edward Joseph and Myrtle McNamara.Myrtle died June 25, ?, around 1928 - 31.Edward died either just months before or after her. They had one child, my grandfather, Edward Baron McNamara, born 8-26-21 in Boston, Ma. and was a small child when they died and was raised in foster care.We are unsure of any other siblings, but the name Jack appears from time to time.Photos put them in Santa Monica, Ca. around 1925. Please contact me with any information.Thank You.