Additional numbers in Middle Welsh: 11 un ar ddeg, 12 deuddeg, 13 tri/teir ar ddeg,
14 pedwar/pedair ar ddeg, 15 pymtheg, 16 un ar bymtheg, 17 deu/dwy ar bymtheg,
18 deunaw, 19 pedwar/pedair ar bymtheg, 20 ugein(t), 21 un ar ugein, 30 deg ar ugein,
40 deu ugain / dugein, 50 deg ar ddeu ugain/ddugein, 60 trei ugein, trugein, 100 can(t), 1000 mil.
Proto-Celtic, or Common Celtic, is the reconstructed ancestor
of all known Celtic languages. The Late Bronze Age Urnfiend culture
of Central Europe of the last quarter of the second millennium BC
is the earliest example of what is considered Proto-Celtic culture.
Gaulish is an extinct Celtic language that was spoken in
parts of what is now France, Switzerland, Belgium and northern Italy until
about the 6th century AD.
Common Brittonic is the reconstructed ancestor
of the Brythonic or British branch of the Insular Celtic
languages (Welsh, Cornish, Breton, Cumbric and possibly Pictish).
Old Welsh (Hen Gymraeg) is the name given to the Welsh spoken
between about 800 AD and the early 12th century.
Middle Welsh (Kymraec / Cymraeg Canol) is the form of Welsh
spoken from the 12th to the 14th century.
Primitive Irish, or Archaic Irish (Gaeilge Ársa)
is a form of Irish known from inscriptions in Ogham found in Ireland and western
parts of Britain. It was spoken between about the 4th and the 7th or 8th centuries AD.
Old Irish is the form of Irish which first appeared in writing
in about 700 AD and was used until about 900 AD. It is the ancestor of Modern Irish,
Manx and Scottish Gaelic.
Classical Gaelic was the literary form of Gaelic
used in Ireland and Scotland between the 13th and the 18th