I looked at the Strong's Concordance and it says perhaps "Day of EL/God". Any insight into what this name may mean?
The translation of 'Day of G-d' would be 'Yemuel' - 'ימואל' i.e. an amalgam of the hebrew word for day - יום and קל - G-d. This name is the alternative version of the name of Shimon's son (see Bereishis 46:10)
The name Nemuel - נמואל is referenced to the same individual in Divrei Hayamim 1 4:24 and would mean 'Circumcised of (or for) G-d'.
See here for further elaboration.