Stephen,
by the suffix of the name, -ovich, I'm sure is comes from Russia
This suffix is translated as "son of": Ivanovich - s/o Ivan, Abramovich - s/o Abram, Yerukamovich - s/o Yerukam (by the way Yeroham is the name from the Bible). I think in other Slavic languages it sounds a little different.
More: are you sure it is the surname? For Russian it is too long, it is prefered be, as a surname, just Yeruhamov.