Willerich[1] (*unknown – 4 May? 838*) was the second bishop of Bremen in Germany; or, according to some, the first, his predecessor Willehad being just a missionary in the area, and the diocese set up after his death.[2] He was consecrated in 804 or 805.
He took part in an evangelizing mission to Denmark in 823, with Ebbo of Rheims and Halitgar, bishop of Cambrai. It had only a very limited success, the conversion of the north would take place later with Ansgar.[3]