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Kelsey is an Anglicized form of the Gaelic surname Mac Alasdair, meaning 'son of Alexander'. Alexander itself is derived from Greek, meaning 'defender of mankind'.
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Both Kelsey and Brynn are of Welsh origin and have a similar soft, feminine sound.
A classic Welsh name that complements Kelsey in terms of style and cultural background.
Kelsey and Logan both have a modern, strong yet approachable feel, suitable for siblings.