Genitive Form: Pheit Gheallais

Sources

Pittolies 1747-55 Roy

Pit-yolish Pitioliʃ: Diack MS2771/1/
Pet-yollʃ: 1920 Diack MS2271/1 Nairn [never heard peit in sense of bit]
Pit-yaulish / Pit-yoLsh Diack MS2276
Peit-gheollais Watson 1926, p. 499
Peit Gheollais [as part of Loch Peit Gheollais ~ Loch Pityoulish]: Grant. Gaelic Heritage of Rothiemurchus
Creag Phitiulais OS modern OS maps
Baile Gheallais / Baile a’ Gheallais x3 People’s Journal 14.2.1942 [in a Gaelic story, possibly printed earlier.]
Old name Ballegealish 1987 A. Watson TGSI Gillie’s Loban’s Notes, p. 87

Additional Information

Baile Gheallais appears to have been an alternative name.