List of Letterkenny characters WikipediaLetterkenny is a charming settlement with a deep-rooted feeling of community. Everything about Letterkenny is special, especially its inhabitants. One particular resident who has stolen the hearts of many is the delightful Katy. Catherine brings affection and joy to Letterkenny, County Donegal with her captivating presence. She is beloved by everyone who crosses her path. Letterkenny, County Donegal Katy is a match made in heaven!