From Aramaic ܬܠܬ (təlāṯ), from Proto-Semitic *ṯalāṯum.
ܐܶܬ݂ܠܰܬ݂ (ʾeṯlaṯ) f (masculine ܬ݂ܠܳܬ݂ܰܐ (ṯlōṯa))