(WJW) – Amazon founder and multi-billionaire Jeff Bezos is mourning the loss of his mother Jackie Bezos, who died after a long battle with dementia.

The 78-year-old philanthropist died peacefully at her Miami home on Thursday, according to a statement from the Bezos Family Foundation.

She died surrounded by loved ones — including her children, grandchildren and husband Miguel Bezos — after a years-long battle with Lewy body dementia, Jeff Bezos wrote in a social media post.

"She always gave so much more than she ever asked for," the businessman wrote on Instagram. "We were so lucky to be in her life. I hold her safe in my heart forever. … I love you, mom."

Jackie Bezos, who alongside her husband invested more than $245,000 into their son's website (which would become Amazon.com) in 199

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