Boid on Lilith

The dictionary is unable to give any etymology. Given his wife’s name, there must be a connection with night. That accounts for the first four letters. The suffix ukh is the difficulty. There is a suffix ukh or okh in some Aramaic dialects and in Biblical Hebrew, but it is fossilised, i.e. it only occurs in proper names and doesn’t form new proper names. Its function is to form an adjective from a noun. An example is Ariokh meaning lionlike, from Hebrew ari, a lion. The meaning of this name would then be “connected with night”, which is what his wife’s name means. He is the male equivalent of Lilith. Any connection with Eliyahu Elijah can be dismissed.