"Variant of Arham"
The name Arhum is commonly a male name from the "Arabic" origin.
Arhum is a spelling variant of Arham, a name built on the Arabic root r-h-m, the root behind rahma (mercy). The form arham is the elative of that root, literally "most merciful." The two spellings differ only in the final vowel, a common kind of variation when Arabic names are written in Latin letters.
Arham means "Merciful, Compassion".
The pronunciation of Arhum is AR-hum.