Sigo (Latin: Sequanus; French: Seine; died c. 580 AD) was a Burgundian abbot of the sixth century.
After living as a hermit for some time, the bishop of Langres ordained him to the priesthood.
However, he was disliked by the local clergy, so he went to the monastery of Réomé to study scripture and help the monks there.
He gained a reputation for miracles, began gathering followers and the monastery soon flourished.
The monastery attracted nearby peasants who started settling a small community around the church.