Marthad'ilan Yu'nim (Arabic: مرثد ألن ينعم) also known as Marthad al-Khayr, was a Himyarite king who primarily reigned in the late 5th century CE.
[1] In the books of Arab heritage, his name is Marthad al-Khayr ibn Dhi Jadan.
According to the inscription YM 1200, he constructed a synagogue and repaired an unknown monotheistic place of worship known as a Kenesit.
[4] According to the Arabian traditions, Marthad'ilan Yu'nim was succeeded by a king named Qarmal.
[2] Marthad'ilan Yu'nim sent a force of five hundred soldiers to assist Imru' al-Qays in his mission to reunite the Taghlib and Banu Bakr tribes in the Basus War in order to defeat the Banu Asad.