Amazon founder Jeff Bezos ' mother, Jacklyn Gise Bezos, has died following a battle with Lewy body dementia, he announced on Instagram. She was 78.

Gise Bezos died in her Miami home on Thursday, according to the Bezos Scholars Program, a foundation she started with her husband, Mike Bezos.

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"After a long fight with Lewy Body Dementia, she passed away today, surrounded by so many of us who loved her — her kids, grandkids, and my dad," Bezos, her eldest son, wrote in an Instagram post on Thursday. "I know she felt our love in those final moments."

Lewy body dementia is a type of dementia in which protein bodies called Lewy bodies develop in the brain's nerve cells, impacting the regions involved in movement, memory

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