girls:

• Brannigan, Brogan
• Carrigan, Corrigan
• Deegan
• Karrigan, Keegan, Kerrigan
• Logan
• Madigan, Mattigan, Megan, Merrigan, Morgan, Morrigan
• Negan
• Raegan, Reagan, Rogan
• Teagan

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boys:

• Branigan, Borgan
• Cadogan, Cogan, Corrigan
• Deagan, Deegan, Dougan
• Egan
• Finnegan, Flanagan
• Gilligan
• Harrigan, Hartigan, Haygan, Hogan
• Keagan, Keegan, Kogan
• Logan
• Madigan, Morgan, Mulligan
• Neegan
• Reagan
• Teegan, Teagan