Meaning and history
From an Irish surname, an Anglicized form of Ó Raghailligh, which comes from the given name Raghailleach and has an unknown meaning.
20062006: 178 births, rank #1,314
2007: 199 births, rank #1,244
2008: 193 births, rank #1,286
2009: 163 births, rank #1,432
2010: 139 births, rank #1,574
20112011: 140 births, rank #1,564
2012: 108 births, rank #1,859
2013: 103 births, rank #1,929
2014: 89 births, rank #2,139
2015: 90 births, rank #2,123
20162016: 99 births, rank #1,996
2017: 75 births, rank #2,401
2018: 72 births, rank #2,457
2019: 81 births, rank #2,249
2020: 81 births, rank #2,216
20212021: 65 births, rank #2,638
2022: 65 births, rank #2,661
2023: 50 births, rank #3,225
2024: 64 births, rank #2,694
20252025: 60 births, rank #2,822
Reilly moved from #911 to #958 for boys between 2007 and 2008. Its highest annual birth count came in 2007, with 218 births.