The name "Trodden "originated, as far as can be ascertained, in County Louth, Eire. The surname derived from the surname O'Treodane and gradually through the years it became Trodden, Trudden, and Troden to name just three of the various spellings.
County Armagh in Northern Ireland is the home county of the Troddens, Truddens and Trodens. Troddens were in Armagh City, Corran, Ferlough, Granemoor, Balleymacnab and Keady, which is a market town in County Armagh.
My own family, surname Trodden, came from Corran in County Armagh. Northern Ireland.