The story
- Old English · derived fromdene“valley”
- English todayRattlesden
The first element is still obscure, while the second one certainly derives from Old English dene (“valley”).
Words from the same roots
Old Englishdene all →
deanDaneDanburyDenbyDenhamdeneDanbyDenholmDenslowLittle Missenden
Etymology from Wiktionary, CC BY-SA 4.0.