In my opinion (take it or leave it

) this is one of those names that is very interesting.
If it is a compound Hebrew it could be MAR (to be bitter / be in pain) + BVS (to trample). A Hebrew explanation would then be "trampler of pain".
With a bit more imagination bit could be formed by the Sumerian MAH (great) + RAH (disease) + HAS (to break). A Sumerian interpretation would then be "great breaker of diseases".
Another might be Persian MARBA (spring habitation) or MARBASTAN ( to tame a snake).
This is also seen in (possible...) Interpretations of his Enn:
Renach Tasa Uberace Biasa Icar.
A Sumerian(esque) version could be:
RIN AK TA SA UBARA SE BI AS E GAR
(Tear off the curse, form a walk around me, light me up, protect and live within me)
A Latin(esque) version could be:
RENASCI TASSA UBER AC A BI ASA ICERE
(To be reborn and receive plentiful from the two sanctuaries, that is the task for which i make a treaty with you)
A Hebrew(esque..) version could be:
REYACH TVSHIAH OVB BARAKAH BI AZA IQAR
(The smell, your counsel is a blessing for the soothsayer, please Kindle it, magnificent..)
This is based on my idea that (many of these) spirits' powers / attributes / appearance are shaped by the expectations / interpretations of names and words.