I've been interested in heraldry for a long time, that's why I had the coats of arms in my family drawn up a few years ago. There are three coat of arms in my family. Two of them have been around for hundreds of years and one was designed in the late 70's/early 80"s. I'm now at the point where I want to assume arms. I have a few questions about the arms in my family, I hope you can help me with these questions. The pictures below are bit stretched because I re-sized them quickly.

This one was registered with the CBG (Central Bureau for Genealogy in the Netherlands) for all descendants of Cornelis Ariensz. Treur alias Lantheer(first of the name) except for the descendants of the next registration. The problem is that these arms are only known to have been used by the oldest branch in the family. The first known users and the first Landheer are seperated by roughly 3/4 generations. It is possible that these where used by my forefather. He was Schepen (best translation: Alderman) of Oud-Beijerland and so were many of his descendants in the oldest branch. Many Schepenen adopted arms to seal official documents in the Netherlands, that's why it realy could be his arms. I've heard of arms being based on known arms, when no direct direct link can be established. I have two questions about that: Is this also true in the Netherlands? (I have never heard about it) And second: If this is possible, what kind of link do you need?

This one was also registered with the CBG (Central Bureau for Genealogy in the Netherlands) for all descendants of Cornelis Ariensz. Treur alias Lantheer(first of the name) except for the descendants of Huijg Landheer from the previous arms. These arms originated in the female line. Found in the will of Adrianus Landheer, where he's stating that his children should adopt these arms in remembrance of their Mother. I really don't feel comfortable using this one because of this reason. It is definitely not my right to use these arms even though the registration says I can.

These arms were designed for the family society(no longer existing) to serve as a coat of arms for the descendants of Cornelis Ariensz. Treur alias Lantheer. This because of the uncertainties coming with the previous shown arms. My problem with these arms is the field above the millstone. It's a reference to the place my family originated from. Is this a correct heraldic use of that field? I heard about those fields being used to show a persons position, like in the HRE.
The last option is designing new arms, but that doesn't have my preference at the moment.
I hope that the answers I get can help me decide what to do. Thank you for reading this and I hope you can help me!