The Baa-Baas, who have already beaten England 49-36 and Scotland 24-15, have named 19 internationals from nine countries in their 22-player squad.
Wales have beaten the Barbarians just once in their previous five meetings - a 31-10 win at the Arms Park in 1996.
Barbarians (v Wales): P Montgomery (Newport & South Africa); A Tuilevu (Otago & Fiji), C Stoica (Castres & Italy), D Gibson (Bristol & New Zealand), B Reihana (Northampton & New Zealand); F Contepomi (Bristol & Argentina), M Robinson (Auckland Blues & New Zealand); O le Roux (Natal Sharks & South Africa), M Sexton (Ulster), F Tournaire (Leicester & France), R Strudwick (London Irish), M Connors (Northampton & Australia, CAPTAIN), S Harding (Otago Highlanders & New Zealand), O Magne (Montferrand & France), AJ Venter (Natal Sharks & South Africa).
Replacements: R Ibanez (Castres & France), A Garvey (Newport & South Africa), M Galwey (Munster & Ireland), S Phelan (Club Athletico San Isidro & Argentina), D Edwards (London Irish), M Perry (Bath & England), S Staniforth (NSW Waratahs & Australia).
Click here to see the Wales team