Irish naming patterns were very precise for about two centuries. Here's how you can use the patterns to find your Irish ancestors... http://www.ancestralfindings.com/irish-naming-patterns-discover-irish-origins-names-family/
Caelyn. Irish pronunciation "Keelin," meaning 'Slender and fair.' This is the Anglicized pronunciation of Caoilfhionn, the name of several Irish saints. This is also the 'correct' pronunciation for Caelan (though I love 'kay-lynn' too!). For more name inspo, visit http://pinterest.com/meggiemaye/for-love-of-names/
Tracing Your Irish Family History on the Internet: A Guide for Family Historians. Top 10 Irish genealogy books that will provide you the guidance and essential information you need to help you in your Irish ancestry research.