Thank you Gus and yes it's wonderful and at the same time quite a challenge, to add this little miracle and a whole new branch from Brasil, where her father was born, to our family tree :)
Of course I have been looking for you for the last name Sweerts, and where it might come from. I'm not certain and of course there are several options, but the most likely one is that it originally comes from a quite famous Sweerts family...
Brussel was founded by 7 noble families or "lineages" (Sleeus, Sweerts, T'Serhuyghs, Steenweeghs, Coudenbergh, T'Serroelofs and (de) Roodenbeke) The 7 Families each guarded one of the 7 city gates of Brussels and had the right to sentence and lock up members of their own gender in the prison of the city gate, of which the security was entrusted to them.
No one was allowed to have a public office in Brussels unless he belonged to one of the 7 families. One had to prove his birth. However, additional and strict conditions were imposed.
Those who were eligible, for example, should not be a hand worker. They had to have a certain age, etc. and in addition, one had to pay a large entry fee. But most important was, one had to prove the descent of a certain ancestor to be included. In other words, one had to compile a family tree. So supposedly the genealogists had "a lot of work."
For this "Sweerts" family the name comes from "Sweertianae", zwaarddragers, "gladiï" (= swords or sword carriers) so it's probably an 'occupational' name showing they were or were descendants of knights.
The earliest ancestor (progenitor), according this book with genealogies for noble families from the 7 Povinces, for the Family is Dirk van Landas, his sons Jan (knight) and Thomas according the genealogy used the name Sweerts, later by marriage the name de Landas was added again and it became the Sweerts de Landas family.
Hope it helps and have a wonderful weekend !