Dear Jack: I know exactly how it feels when the "last" of your "aunts/uncles" dies. I had favorites, of course, but I must say that each of my dad's brothers, sisters and in-law spouses make a mark on my heart when they passed. Of course, it's nowhere near the pain of losing a parent.
When my mom's sister, my Aunt Doris, died a week before Thanksgiving in 2022, she was the very last link to my family's past. It was, and is, devastating.
My sincere condolences for the loss of your Aunt Martha.