The symbol is known in Finland/Karelia as Siivilänpesonen, but I also found the same symbol in old Ukrainian folk art, where it is called Krynytsia (Well).
The meaning to the symbol is told to be:
The well, marked by crossed diagonal lines, symbolizes the link between worlds - like a real well that draws not just water, but ancestral memory. Alongside it, the fertility rune invokes abundance and continuity of life.