Little Jake Walter Nicklaus apparently drowned in a hot tub at his parents' house in North Palm Beach on Tuesday. His father is Steve Nicklaus, one of the golfer's five children.
Golfers Raymond Floyd and Ian Baker-Finch attended the service in Palm Beach Gardens.
Officials say the toddler apparently slipped away from a nanny after they had left the pool area.
Jake was one of 17 grandchildren of Jack and Barbara Nicklaus.
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