I have finally (re-) located this piece of information:
from Dictionary of American Family Names, Edited by Patrick Hanks, Oxford University Press, 2003, Volume 3, Page 499.
Trice 1. English (Kent): perhaps a variant of Treece. 2. Altered spelling of German Treis, a topographic name for someone who lived by or owned an uncultivated piece of land used as pasture, from Middle Low German drisch,"fallow land", or a habitational name from a place named with this word (in Hessian dialect treis), in Hesse or on the Mosel river. Alternatively, in some instances it may be from a short form of the personal name Andreas (see ANDREW).
Triche 1. French: from Old French triche 'trickery', 'deception', or, written Triche, from the past participle of tricher 'to trick or deceive'. Both names may have denoted a cheat or a cunning, deceitful person. 2. Altered spelling of German Trisch, a variant of Driesch, a topographic name from Middle High German driesch 'uncultivated land used as pasture'. See also TRICE 2.
Trichel Respelling of German Trischl, a variant of Drischel, itself probably a variant of Dri(e)sch (see TRICHE). This name is found mainly in LA.
Trick English (southwest and South Wales): metonymic nickname for a cunning or crafty person, from Middle English trick 'stratagem', 'device' (from a Norman form of Old French triche).
Trickel Respelling of German TRICHEL.
So it appears that TRISCHL was akin to common names such as Fields or Meadows.