Mafalda is nearly unknown in the English-speaking world, despite an appearance in HarryPotter. Indeed, it does have a witchy feel. Matilda itself is preferable, or her French form Mathilde, Spanish Matilde, or abbreviation Maud.
Mafalda of Savoy (1125-1158), first queen of Portugal
Infanta Mafalda of Portugal (c. 1197-1256), Portuguese princess and queen consort of Castile
Mafalda-Cecilia Preslavska (b. 1994), Bulgarian princess
Mafalda Arnauth, Portuguese fado singer
Mafalda Favero, Italian soprano
Mafalda Salvatini, Italian soprano
Mafalda Veiga, Portuguese singer-songwriter
Mafalda Hopkirk, character in the "HarryPotter" series
"Mafalda," comic strip written and drawn by Argentine cartoonist Quino.
Mafalda, a HarryPotter character originally supposed to be introduced in the fourth book as a Weasly cousin