Monica Wilkins

Monica Wilkins is the name that Hermione Granger gives her mother Mrs. Granger when she, in 1997 goes with Harry Potter to find Horcrxes, modifies his memory to prevent him from telling anything to the Death Eaters (because unfortunately she has told her a lot about Harry) and to keep him safe. After the modification Mrs. Granger belives she is Monica Wilkins married to Wendell Wilkins, without any kids. Their life ambition is to move to Ausralia.

Presumably Hermione Granger gave Mrs. Granger back her memory after the death of Voldemort.