Brent, I've also been working on Lotzkars. My great grandparents were Sarah and Samuel. You can see what I've done if you go to "Flaherty whole family tree." Search for Lotzkar.
I've put in some information about the West Coast Lotzkars.
I haven't figured out the connection between the East Coast and the West Coast Lotzkars yet but I am sure they are connected. It is a pretty unusual name and they almost all came from Bulgaria (a couple came from Romania but that is pretty close. My grandfather Lazar Teitelbaum, who married Adele Lotzkar, was from Romania. He brought many of the Lotzkars to the US.