With Girvan Dempsey and Kevin Maggs already confirmed, Ulster duo David Humphreys and Gary Longwell, Munster hooker Frankie Sheahan and Leinster back row Eric Miller have also been pencilled in to star for the touring side.
Coach Bob Dwyer is expected to top up his squad to 32 next week with several top ranking Wallabies due to fly in for the Baa-Baas' two Test tour.
As well as lining out against Scotland at Aberdeen FC's Pittodrie Stadium on Tuesday, May 24 (kick-off 7.30pm), Dwyer's charges are also primed to face England at Twickenham (kick-off 3.00pm), four days later.
Both matches will be televised live by Sky Sports.
Barbarians Provisional Squad (v Scotland):
Bruce Reihana (Northampton Saints & New Zealand), Kenny Logan (Glasgow Rugby & Scotland), Girvan Dempsey (Leinster & Ireland), Trevor Halstead (Natal Sharks & South Africa), Kevin Maggs (Ulster & Ireland), Brent Russell (Natal Sharks & South Africa), David Humphreys (Ulster & Ireland), Thomas Castaignede (Saracens & France), Mark Robinson (Northampton Saints & New Zealand), Bryan Redpath (Sale Sharks & Scotland).
Mark Regan (Leeds Tykes & England), Frankie Sheahan (Munster & Ireland), Cobus Visagie (Saracens & South Africa), Darren Morris (Leicester Tigers & Wales), Gary Longwell (Ulster & Ireland), Selborne Boome (Northampton Saints & South Africa), A J Venter (Natal Sharks & South Africa), Simon Shaw (London Wasps & England), Eric Miller (Leinster & Ireland), Sebastien Chabal (Sale Sharks & France), Corne Krige (Northampton Saints & South Africa).
*** Tickets are still available for the Scotland v Barbarians clash at Pittodrie, from scottishrugby.org and the Murrayfield (tel: 0044 (0) 870 040 1925) and Aberdeen FC (tel: 0044 (0) 1224 650434) ticket centres ***