From Wiktionary, the free dictionary
ṣṣ
- used in Romanization of the Hebrew צּ (“tzadi”, “tsadi”, “ẕadi”, “ṣāḏē ḥāzāq”) in the ISO 259 transliteration scheme
- (Romanization of צּ, “tzadi”, “tsadi”, “ẕadi”, “ṣāḏē ḥāzāq”): ts (Hebrew Academy 2006 transliteration scheme), ẕẕ (Hebrew Academy 1953 transliteration scheme), tz (Common Israeli transliteration scheme)