I have been provided with the following section:
Mr. Hooper also had the blessing of loyal Elizabeth, who was to be his wife someday.
Is the clause "who was to be his wife someday" nonrestrictive?
jhilly89Is the clause "who was to be his wife someday" nonrestrictive?
Yes, and it is therefore correctly set off by a comma.
Proper nouns (like Elizabeth) are very rarely followed by restrictive clauses.
CJ
Yes, it is.
Unless there is an unlikely context that has two loyal women called Elizabeth, only one of whom is going to marry him. 
(that's a little joke.) In that case, don't introduce it with a comma.
Clive
