Yeah. I have twins with Rose and the Doctor too. It's a complicated place here. I'm sure you'll meet Kyoko, Tyler and Fred. Though... Kyoko and Tyler are normally adults, but they are currently two and four respectively.
Sorta... We are still establishing Torchwood here, but the team has expanded since Owen is still alive. We also have a male Tosh and a female Owen. Their names are Toshio and Olwen.