Bezos announced on Instagram that his mother, Jacklyn, died inside her Miami home after a battle with Lewy Body Dementia.

Gise raised Jeff as a single mom, meeting Cuban immigrant Miguel Bezos, now 79, while she was going to night school and working during the day at a bank, said the tribute. They were married in 1968, with Bezos adopting her young son. They went on to have two more children, Christina and Mark.

Jackie Bezos, a fierce protector of her son Jeff before he founded Amazon.com and a deep-pocketed advocate for early childhood education, has died. She was 78.