Yep. Found this.<br/><br/>Copied from Memory Alpha: Surnames (http://en.memory-alpha.org/wiki/Surname)<br/><br/><div class="quoteheader"><div class="topslice_quote">Quote</div></div><blockquote class="bbc_standard_quote">The Trill are born with family last names. Once joined, they adapt their host's name as their surname.<br/>(TNG : "The Host")</blockquote><div class="quotefooter"><div class="botslice_quote"></div></div>