Survey of English Place-Names

Historical Forms

• Dideham 1224–5 Ass 13th ReadingC

• Didenham 1224–5 Ass 1345 Cl

• Dydeham 1248–9 Ass

• Dydenham 1294 SR 1349 Ipm

• Didenham Fm 1761 Rocque

• Diddenham Manor Fm 1846 Snare

Etymology

Diddenham Fm, Dinheham c. 1190, Didenam 1195, Didenham c. 1195, Dideham c. 1200 all HMC 9th Rep 1, Dideham 1224–5Ass (p), 13thReadingC , Didenham 1224–5Ass (p), 1345 Cl, Dydeham 1248–9Ass (p), Dydenham 1294SR (p), 1349 Ipm, Didenham Fm 1761 Rocque, Diddenham Manor Fm 1846 Snare. The second el. is probably hamm , as the farm is on low ground near Foudry Brook. For the first, the forms clearly suggest a pers.n. Dida , but no such name is on record; the name *Dydda is well-evidenced in Gl (Gl 2, 9), and the recorded Dudda occurs in Didcot (Pt 2).