Martha Jones and Ianto Jones
Martha laughed at Ianto's response and moved to stand closer to him and facing Jack, "Yeah, Jack, it should be obvious." She'd noticed early on that her and Ianto had the same last name, but it wasn't as if Jones was an uncommon last name. It was one of those names like Smith where one usually met more than one person with those last names in their lifetime. "And it went really well." She said in response to Jack's question, "Mickey is here somewhere. I think he went to get us drinks and then I saw Ianto over here."