The first was Francisco Wexler, descendant of Jewish Bessarabians who settled in Brazil, like my grandparents. In a conversation with my father, he said that in the village of Oliscani, in order to keep warm in the harsh winter, the houses were built with double walls. People would light the fireplace and the heat would be stored in the space in between walls - hence warming it up.
I don't know, but when I spoke to Semion Hinkis, also in Israel, he convincingly explained that Talpalars and Tolpolars are not directly related, coming from different villages in Bessarabia. A long time ago, Jews didn't have a surname. When the time came that the Tzar obliged them to have one, it was just a coincidence that two different families chose similar - and very uncommon - last names. The same way all "Stein", "Kaufman", etc. may not be related. And in addition, he said "Talpa" in Romanian is not related to the shoe sole as we thought, but to a bat. Yes, the animal bat.
So it's possible that my family liked the flying rodents?
More food for thought.