Celtiadur – an Etymological Dictionary of Celtic Languages

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This site contains words that are similar or cognate, in Celtic languages, including Irish, Scottish Gaelic, Manx, Welsh, Cornish and Breton, as well as their historical versions and ancestors.

You can find out more about the Celtic languages on Omniglot – the online encyclopedia of writing systems and languages.

The name Celtiadur is one I coined which combines the word celt and the Welsh suffix -adur, which appears in such words as geiriadur (dictionary), dyddiadur (diary), gwyddoniadur (encyclopedia) and ieithiadur (grammar, dictionary, vocabulary). It is also used in Breton.