Born in TA 2983 (SR 1383) in Buckland, Mentha was the second child of Marmadas Brandybuck and granddaughter of Gorbulas Brandybuck. Her older brother was Merimas and her younger sister was Melilot. In TA 3001, Mentha was already 18 years old when se and her entire Brandybuck clan attended Bilbo's Farewell Birthday Party.