Are you sure of Erudil's etymology?
I have The Languages of Tolkien's Middle Earth by Ruth Noel, Houghton Mifflin Company. This book contains an English-to-Elvish glossary. This glossary contains no entry for "servant". On the other hand, page 81, there is the entry:

friend (n)dil, (n)dur, nil, nur, S mellon.

So I think Erudil is rather God's friend, not His servant. The meaning is rather different.