From Mac Raghnaill, ‘son of Raghnall’ — chiefs of Muintir Eolais in County Leitrim, the name built on a Norse-derived personal name.
The Reynolds certificate.
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Gaelic Origin · Root name Raghnall (Norse-derived)
Reynolds anglicises Mac Raghnaill, ‘son of Raghnall’ — Raghnall itself borrowed from the Norse personal name Rögnvaldr, absorbed into Gaelic naming generations after the Vikings themselves had gone. The Mac Raghnaill were chiefs of Muintir Eolais, a territory in County Leitrim.
A name three layers deep — a Norse personal name, given a Gaelic son-of prefix, then anglicised back into English — and still standing after all three journeys.
Irish form: Mac Raghnaill
