Whelan is an Irish surname and given name, derived from the Gaelic Ó Flaithbheartaigh, meaning 'descendant of Flaherty'. It is often anglicized to Phelan or Whelan. Historically, it was a patronymic name, indicating that the first bearer of the name was a descendant of someone called Flahertie, who was likely a chieftain or person of high status in ancient Ireland. The name has been associated with notable figures throughout history, including Irish poets, politicians, and athletes, reflecting its enduring presence in Irish culture and beyond.
The name Whelan experienced a significant increase in popularity between 2011 and 2022, with a total of 64 births recorded over this period. The highest number of births occurred in 2022, with 15 babies named Whelan. However, there was also a notable spike in 2017 with 8 births, indicating that the name has had periods of popularity throughout the decade.