Ruhban is an Arabic word that means "one who fears God severely", "one who is very virtuous". It has a good meaning, therefore it can be used as a name, but it is not commonly used as a name by Muslims because it also means "Christian monk". It is pronounced [p(R)ay + p(U)t + (H)ot] + [(B)oy + m(AN)].
The name you mentioned can also be another spelling of Rahban, pronounced [p(R)ay + r(U)n + (H)ot] + [(BAN)d], is a Persian name that means "guard of the road", "guardian of roads". Since it has a good meaning Muslims can use it.