This sub-category is part of the Łojszczyk Name Study for ancestors of the surname who were associated with this location. If possible, please sub-categorise using the location categories established for that country as a guideline.
To add a profile to this subcategory, use the following sticker template: {{One Name Study|name=Łojszczyk|category:Warsaw, Warsaw, Masovian, Łojszczyk Name Study}}
Alternatively, add using the category [[Category: Warsaw, Warsaw, Masovian, Łojszczyk Name Study]]