V'elokim Malki Mikedem
The tune of this niggun is a niggun Rikud from Nikolayev.
Many niggunim that were composed for Yud Alef Nissan were recorded for the Nichoach series. When a list of niggunim being prepared for volume 8 of Nichoach was submitted to the Rebbe, the Rebbe added in ksav yad “V'elokim Malki Mikedem”