The "yan, tan tethera" counting system is a fascinating survival in the modern age. My belief is that it was originally pre-celtic, although it has been strongly influenced by Brythonic. Has anyone noticed that in Burushaski, a language isolate in Kashmir, the numbers begin "hin, altan", and that it uses base twenty. Could it be possible that primitive pastoralists moved from Asia into Europe, long after Basque and Georgian had existed, but well before the metal-working, horse riding Proto Indo-Europeans? They would have spoken something like Nostratic, before the eurasian language familes split. The "un, dau" of Welsh seems to me quite a way from "yin, tan", and the number nine, "conter, horna etc" seems closer to Burushaski "huncho" than Welsh "naw". My mother heard as a young woman from a friend of one the goons, that "ying, tong, iddle,i, po" was one to five in a south-east asian language isolate! What are your thoughts, guys and girls?