The story
There is a stream named Wyth Burn that flows into Thirlmere.
Etymology from Wiktionary, CC BY-SA 4.0.
Wythburn
Today it means: A locality in St John's, Castlerigg and Wythburn parish, Cumberland district, Cumbria, England, at the south end of Thirlmere (OS grid ref NY3213). Full definition →