I understand that the apostrophe character ' is used to indicate missing characters, e.g. it's => It is. It is commonplace to use contractions in surnames, such as O'Reilly (of), or D'Artagnan (De), but I don't recall ever seeing contractions used in first names.
Is it correct to use 'Becca for Rebecca, or 'Tori for Victoria? Or is it just that people are lazy and tend not to use apostrophes as the first character of a word?