PAL

Ptolemaeus Arabus et Latinus

_ (the underscore) is the placeholder for exactly one character.
% (the percent sign) is the placeholder for no, one or more than one character.
%% (two percent signs) is the placeholder for no, one or more than one character, but not for blank space (so that a search ends at word boundaries).

At the beginning and at the end, these placeholders are superfluous.

Λέων ‘Leo’

Greek. – Grammar: n.

References: Alm. Heiberg: II.7, 124:5; II.8, 134-140; VII.96-101
Translated into:
Arabic: أسد [Alm. MS Leiden: f. 21r.5; f. 23r-24r. – Alm. MS Tunis: ; 27b.19; 30]
Modern translations:
English: Leo [Alm. Toomer: 94; 100-103; 367-8]