Q: Passage: Hickey is a common surname of Irish origin. The original form is Ó hÍceadha, which is still used in Ireland. Notable people with the surname include:

Question: Based on this passage, where does the last name hickey come from?
Let's give stream of consciousness below

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
To answer the above question, the relevant sentence is: Hickey is a common surname of Irish origin. So the answer is Irish.