Ali went to Ireland late in his life to see the town of Ennis.

https://www.google.ca/amp/s/www.irishtimes.com/sport/just-how-irish-was-muhammad-ali-1.2673316%3fmode=amp

This is the key line from the article in regards to your question- Shortly after, Ali paid a visit to Ennis where he unveiled a plaque outside his great-grandfather’s house before becoming the first freeman of the town in its 150,000 year existence.