<
Welsh Cymry Welshmen, plural of
Cymro <
British Celtic *combrogos, presumably “fellow countryman,” equivalent to
*com- (cognate with
Latin com- com-) +
*-brogos, derivative of
*brogā >
Welsh, Cornish, Breton bro country, district; compare
Allobrogēs a Gaulish tribe,
Old Irish mruig piece of inhabited or cultivated land