The sources indicate that Giannotto died without children.
Ianoto Lomelino quondam Manuelis... civ[e] Ianue
Giannotto Lomellini q. Emanuele q. Vincenzo
Cristoforo de Revellino, register 8, 1395, fol. 243v
Cristoforo de Revellino, register 8, 1395, fol. 244r
Giuliano Canella, register 5, 1415–1417, fol. 26v
Protectors (protectores) of the Casa di San Giorgio 1417–1419