Did the Welsh wear kilts??

[McG]

Noo a wis reading a post twa days ago stating that it wisnae just Scotland that wore the kilt it wis a Celtic thing as wis family tartans. Post came fae Wales.
Noo a wis under the impression it wis just a Scottish thing and the Celts never wore kilts or tartan but wore a tunic belted in the middle. Ma source telt me that the Welsh never wore the kilt until 1967 which wis designed bi D M Richards using the colour o' the Welsh flag nor hae they had family tartans it maire o' a modern thing.
Reality is a believe that the kilt wis developed in Scotland and family tartans wis predominently a Scottish tradition.
Am a richt, richtish or wrang? Forgive me if a am wrang but am yin o' those Scots that just think it's oor's!!