p.s. Some uses taken from context in the Florentine Codex:
ce:l
icel. alone, by himself; by itself; he alone; singly; only; plain;
unaccompanied; she alone. <poss-ce:l>.
iceltzin. he alone; only he; he himself. <poss-ce:l-tzin>.
moceltzin. you alone, only you. <poss-ce:l-tzin>.