Source photo - cityarchive Felixarchief in Antwerp
Database: http://zoeken.felixarchief.be/zHome/Home.aspx?f=100&inv=2962
(look at the long blue bar)
1st select in the first column: 'FAMILIENAAM' (Surname)
2nd 'BEVAT' (contains) and
3rd type a piece of a surname. Example 'HLIN' instead of McLaughlin so you get variants.