The feature goes on to state why they decided to run the pictures 55 years after his death:
LIFE.com is publishing these images now, as none of Einstein’s children or step-children are alive, and his last known biological grandchild died in 2008. (He does have living great-grandchildren.) There is no longer any reason to keep these pictures, and their story, in the dark.
That lead me to research his great-grandchildren, and I found that one is actually an anesthesiologist for a plastic surgeon.
I think it would be tough to be a direct descendant of Einstein. As proud as you may be of the man, I would think that the expectation of intelligence would be stressful and that you would feel almost pressured to earn a doctorate of some kind.