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Welsh tân
Breton tan (cognate)
Proto-Celtic *teɸnets (inherited)
Proto-Indo-European *tep- (root)
Proto-Indo-European *tep- (derived)
Cornish - (cognate)
Old Irish teine (cognate)

Breton tan (cognate)
Welsh allanfa dân (mention)
Welsh tanau (affix)
Welsh trydan (affix)
Welsh tanwydd (affix)
Welsh tân gwyllt (compound)
Scottish Gaelic teine (mention)
Manx çhenney (mention)
Cornish tan (cognate)
Old Irish teine (cognate)