This note applies to the German Mennonite use of the name Fehr:

The name, as used by German Mennonites, is pronounced like Fair. The first known Mennonite using a form of this name was from a family that had fled the port of Veere in Zeeland, Netherlands during unrest in the 16th century, and took the name 'de Veere' or 'de Veer' (meaning 'from Veere'). Veer would have been pronounced much like the English Fair, and as the Mennonites moved from place to place, the spelling of the name changed and eventually became de Fehr and then Fehr. Other variations exist.