So in this academic volume I'm typesetting, an author has specified a character he needs in his transcription of an original manuscript from the 1700s. The thing should look something like an uppercase "Y" rotated counterclockwise by 90 degrees, or a lambda mirrored and rotated the other way. I'm assuming this signifies something other than «the original author has written a rotated "Y"», but I'm not sure what.
It might be related to either Latin (more likely) or Greek (which occurs after it in the text as can be seen below).
I have a couple of handwritten renditions: