"... the rest of the team felt this save compared favourably with one made recently by Barry Ryan, the Irish International Keeper, against Poland's top Chaser...."
-- discussion of Ron Weasley's spectacular save during Quidditch practice (OP19)
Rather than Ireland’s exciting final match against Bulgaria, this first Quidditch World Cup attended by Harry Potter is chiefly remembered for the events that took place in the campground after the match had finished (GF9, Pm).
Barry comes from the Irish name Bairre, a diminutive of Barrfhionn or Fionnbharr meaning fionn "white, fair" and barr "head", "fair-haired". Saint Fionnbharr of Cork was a 6th-century bishop (Behind the Name).
Ryan is an Irish surname deriving from Old Gaelic O'Maoilriain "descendant of Maolriain", which may come from maol/mal "chief" and rian, Old Irish for "water" (Internet Surname Database).
Like the other members of the Irish National Team, Ryan is named for one of J.K. Rowling's friends:
"The Irish Quidditch team players are all named after people I have known." (JKR)
From the Web
Writing by J.K. Rowling on Pottermore: History of the Quidditch World Cup
Pottermore feature: Quidditch collection
Harry Potter Wiki: Barry Ryan