רבי זכריה אלצַ'אהִרִי, שנקרא גם הרז"א או יחיא בן סעיד, נולד בתימן בשנת 1519 בקירוב. על אף היותו תושב כוכבאן, מצפון-מערב לעיר הבירה צנעא, הייתה השפעתו גם על צנעא.
Zechariah (Yaḥya) al-Ḍāhirī, often spelled Zechariah al-Dhahiri, was the son of Saʻīd (Saʻadia) al-Ḍāhirī, from Kawkaban, in the District of al-Mahwit, Yemen, a place north-west of Sanaa. He is recognized as one of the most gifted Yemenite Jewish poets and rabbinic scholars who left South Arabia in search of a better livelihood, travelling to the Zamorin-ruled Calicut and Cochin in the Indian subcontinent, Hormuz in Safavid Iran, Ottoman-ruled Basra and Irbil in Ottoman Iraq, Bursa and Istanbul in Ottoman Anatolia, Rome in Italy, Aleppo, Damascus, Safed, Tiberias, Sidon, Jerusalem, and Hebron in Ottoman Syria, and finally to the Egypt Eyalet in Egypt and the Adal Sultanate in Ethiopia, where he returned to Yemen by crossing the Red Sea and alighting at a port city near Mocha. He wrote extensively about his travels and experiences in these places, which he penned in a Hebrew-language rhymed prose narrative, eventually publishing them in a book which he called Sefer HaMusar, in circa 1580.