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What is 'grandfather' in the Celtic languages?

Answer:
Irish: seanathair/athair mór, "daideo"
(Scots) Gaelic:
Manx:
Welsh:
Breton:
Cornish:
First answer by 2k3r021. Last edit by 2k3r021. Contributor trust: 237 [recommend contributor recommended]. Question popularity: 1 [recommend question].