Wilcome was born in TA 2984 (SR 1384), the same year as his sister Rosie. If they are twins or just Irish twins is unknown. He has two older siblings, Tolman Cotton Jr. and Rosie Gamgee, husband of Samwise Gamgee. As well as two younger brothers, Bowman (Nick) and Carl (Nibs).
He, along with his brothers, fought in the Battle of Bywater.