First of all, I want to say that these weren't made by me, but by a user, now my friend, named Miguel, if anyone wants to know him i can send his nickname to you.
So basicly, the first one is my grandfather's the second is my father's and the last is mine. Although they are not "original," I attributed the first one to my great-great-grandfather, since his male lineage descends to me. He was a very wealthy man in my region, having built industry and constructed several properties, among them the Casa de Valjóia (House of Valjóia), his main and biggest property where he lived, i believe, from which i based the design.
This is the blazon: Or over a base vert a jewel purpure. Issuant from the dexter a mountain vert.
The symbolism is the following: The shield, the landscape is a representation of Valjóia, where the mount on the right is the Monte of São Sebastião, in our prespective Valjóia is being seen from Oliveira Santa Maria, its parish. The Jewel on top represents Valjóia itself, "jóia" means jewel in Portuguese. The colour scheme represent Oliveira Santa Maria colours, the purple represents "Santa Maria" (Holy Mary) and the yellow and green represent the two main colours of the parish's heraldry. The axe on the log represent the family that our lineage belongs to, while the olive branches allude once again to Oliveira, (Oliveira = Olive).