I am a very distant relative through the Dayan/Dajen/Dajon family. My mother's mother's mother was Pola Dajen, and Meichik's mother was Mania Dajen. I am not entirely sure how they are related, but my mother remembers meeting Malke on a trip to Argentina sometime in the late 1950s. Meichik and others are in several of our old family photos.
My grandmother's half brother was Eli Rosenburg (son of Pola Dajen and Misha Rosenburg). His widow and his two daughters are still living in Buenos Aires. We are in contact with them. That is side of the family that members of your family might remember.
As for family lore, Pola's daughters claimed both that we are related to Moshe Dayan and to Igor Sikorski, though I imagine that you would have better knowledge whether that is truth or myth.