That’s why I’m here to help you back, I speak both languages.
In Dutch, trachten means ‘to try’. So ‘to-try-mountain’ doesn’t make much sense.
Also, the Dutch don’t put words together in that way, since the grammar is off.
In German, ‘trachten’ means ‘to strive/aspire’, so ‘strive mountain’ makes a lot more sense in German.
My last name is Meulenberg (mill-mountain), my forefathers had a mill on a mountain. It’s Dutch.
However, your name could also be a place (the town of Trachten). If it exists, it’s probably in Germany, or somewhere close to the border of the Netherlands and Germany.
Cheers!
-T