Key the surname as Mole where this is inferred.
From the Wiki (see http://www.ancestry.com/wiki/index.php?title=World_Archives_...
Infer surnames based on the context of the record if a surname is not explicitly stated for an individual.
Examples: If a record lists "Thomas Brady" and also lists "Thomas" as his father and "Mary" as his mother, infer the surname "Brady" for both his father and mother. If a record lists "John Smith and his wife Mary," infer "Smith" as Mary's surname.