As time went on, Grimace's family was seen in commercials and the VHS series "The Wacky Adventures of Ronald McDonald". He has an unnamed mom, an unnamed dad, a grandma named "Winky", a great, great grandma named Jenny Grimace, and a possible brother named King Gonga (who rules over all Grimaces).

In a 1999 commercial for McDonald's, Grimace has two aunts named Millie and Tillie, whom Ronald mistakens for actual ants while on a picnic.

While many family members have been mentioned, most heavily seen and mentioned is Uncle O'Grimacey who came one month every year, around St. Patrick's Day in March, to bring Shamrock Shakes.

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