Looking for information about a village possible name Demrtau

Hello,
To anyone who can help me locate any information about a village in Poland called Demrtau
The village was active in 1945, I don't have any information in which part of Poland it is located or if it is even a correct spelling. I was given the name in Russian "Демртау".

I am trying to find any information about WWII graves that were near that village, looking for my grandfather's grave. He was killed near that village according to the records.

If anyone has any information, I will appreciate your help.
Thank you in advance.

Additional information. It is possible that the village name is actually spelled as Demptowo

I think there's a spelling error. The German name for the village was Demptau, which was changed to Demtau between 1942 and 1945.