Hi, it was decreted by law that the previous team named Belenenses SAD (Now in the 2nd division), couldn't use the same name as Belenenses (Now in the 3rd division). There was a full separation of these two teams with all the bonds cut down. The Previous "Belenenses SAD" goes by the name of "B SAD" now.
Thank you and have a great day!
https://www.jn.pt/desporto/todos-os-capitulos-do-divorcio-entre-o-belenenses-e-a-sad-14803910.html