Handmade Primitive Potty Chair - Carved initials: KK or YK?? 1800s?

I rarely buy furniture but today I found this old chair. I removed a yucky 1980s cushion to realize it was a primitive potty chair. I found the woodworkers initials carved; appears to be: KK or YK or XK ???
The wood center seat has a different finish because it was covered with the cushion and a cloth. Chair is handmade of wood complete with worm holes. Perhaps walnut wood?? There is am inlaid metal rim to hold the pot. Based on my research, I am guessing this was made around 1810 or so. I would love your input. Thx!