The story
From Old English, "Effa's farmstead," from *Effa + -ing + ham (“home”). The first element is a variant of Æffa, Uffa, a king of the Angles (c. 575), attested in names such as Abridge, Uffington, and Ufford, but of uncertain origin.
Etymology from Wiktionary, CC BY-SA 4.0.