For years there was a site with a list of every Chabad boy and girl.Dunno where they got their list from, but it was quite comprehensive.
I have yet to find an actual name on this site, put in a few test runs and it spit out nothing...
ShidduchimList is brought to you by the Vaad L'Hatzalas Bnos Yisroel, under the direction of Gedolei Roshei Yeshiva. Our database includes names of boys who are presently learning in Eretz Yisrael, Lakewood, Chaim Berlin and Torah V'daas.