Taumoepeau-Tupou was born in Nukualofa, Tonga to Samiuela Ma'afu Tupou and Lu'isa Ma'ume'afo'ou Taumoepeau.
He married 'Amelia Latuniua Ahome'e, the youngest daughter of the Noble 'Ahome'e and Heu'ifanga Veikune.