The surname Regan, along with its variants O'Regan, O Regan, Reagan, and O'Reagan, is derived from the Irish Ó Riagáin or Ó Ríogáin, originating from Ua Riagáin. It is rooted in ancient Gaelic, combining "ri," meaning "sovereign" or "king," with the diminutive suffix "-in," suggesting the meaning "the king's child" or "big king." Historically, the name was associated with two separate families located in Meath and Thomond.
The name Regan, ranked #1642, was found 21951 times in the Census, which makes it moderately familiar. About 7 out of every 100,000 Americans share it.
Our database contains over 2290 people with the last name Regan. This surname is most commonly found in California, New York, Florida. We have over 3 unique first names combined with the last name Regan in our records. The most frequent first names associated with this surname are John, Michael, James.
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