Surname كاسيدي (Cassidy 
, Cassity 
, Cassedy ) , across the world, is a common last name. The last name كاسيدي is habitual in Ireland, where it is quite a common surname, British Virgin Islands, and Bermuda (explore the name in all countries). Measured by absolute frequency, the name is most common in the United States, the United Kingdom, and Ireland. Also, كاسيدي is the forename as well as the last name.