Fosco was the grandfather of Frodo Baggins. Born in TA 2864 (SR 1264), he was the son of Largo Baggins and Tanta (Hornblower) Baggins. Fosco married Ruby Bolger and they had three children Dora, Drogo and Dudo. Their son Drogo was the father of Frodo Baggins. Fosco died in TA 2960 (SR 1360).