Finnley is a spelling variant of Finley, the English form of the Scottish Gaelic Fionnlagh, which combines fionn, "white" or "fair", with laoch, "warrior", and means "fair-haired warrior" or "white hero". The double n ties the name more visibly to Finn, the nickname most families will actually use. Finnley entered the US top 1000 in 2014, peaked at number 591 in 2021 and ranks number 757 in 2025.