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.

Ποταμός ‘Eri’

Greek

References: TB Robbins: 1:9, 27
Translated into:
Arabic: النهر [TB Ar. Yamamoto: 1:9, 48:18]
Modern translations:
English: Eridanus [TB Robbins: 57]