St Cedd

At the rear of the churchyard, through an iron gate and down some uneven steps (take great care) is “St Cedd’s well”, reputed to have been used by Cedd to baptise when he was in the area in the mid 7th Century.
But, who was St Cedd?

At the rear of the churchyard, through an iron gate and down some uneven steps (take great care) is “St Cedd’s well”, reputed to have been used by Cedd to baptise when he was in the area in the mid 7th Century.
But, who was St Cedd?