This is a list of surnames in which the meaning contains the keyword trench.
Dickman EnglishFrom Old English
dic "ditch" combined with
man "person, man". It was originally a name for a ditch digger or someone who lived near a ditch.
Dykstra FrisianFrom Frisian
dyk meaning
"dike, ditch". The name was given to a person living near a dyke or embankment.