I was reading Gorrell* on
Footnote.com - The place for original historical documents online and came across the text in English translated from a French report in which is described German camouflage fabric is described as "colors dvided in lozenges and hexagons giving an undecided affect." I think it is easy to see from this how the term "lozenge" may have come into use although as I think has often been pointed out it is not really correct.
If you didn't aleready know this, you can access Gorrell for free by signing-up for a free membership. I don't work for them, just giving you a suggestion. Loads of things to mine from Gorrell.
*Gorrell's History of the American Expeditionary Forces Air Service, 1917-1919