Yep. There were originally two settlements; Áth Cliath, the traditional Irish one, and Dubh Linn, the Viking one (even though they got their word order backwards!). Eventually Dubh Linn became Dublin, but Átha Cliath is still used among Irish speakers (with Baile Átha Cliath being Dublin City).
Moddey Dhoo, cá bhfuil tú?
According to Wikipedia, "The Moddey Dhoo ... (Manx Gaelic, meaning "black dog") is a phantom black hound in Manx folklore that reputedly haunted Peel Castle on the west coast of the Isle of Man. The Manx name Moddey Dhoo was transcribed as Mauthe Doog by an influential 18th-Century English-speaking folklore source, which led to a history of misspellings of the proper name."
Different languages can have slightly different realizations of the same vowel. In this recording, dubh sounds something like English “dove” (the noun, not the verb), but because the Irish vowel /ʌ/ is sounded a little higher and a little farther back in the mouth than the English vowel /ʌ/, it sounds a bit more like /o/ to someone who’s familiar with the English vowel sound. (Depending upon the word and the particular English dialect, the “short U” typically transcribed as /ʌ/ might be realized as either /ɜ/ or /ɐ/ instead.)