To me a theme is on purpose but sometimes things just happen - a coincidence. Our 2 year old is Kassandra and if this babe is a girl, we are strongly considering Calista. They sound very matchy, Kassie and Callie but somehow that appeals to me too. I don't know. I think we'll just name this kiddo and if people think we had a theme, they are welcome to be wrong lol.
We're dealing with this, too. Our 2 boys have names that start with "R". Total coincidence, but now we feel we have to steer FAR away from "R" names for this 3rd boy because we don't want a theme. But for whatever reason I seem drawn still to R names. I do know a family that started using "J" names for their boys, 7 boys later they really regretted using that theme because they had a REALLY hard time agreeing on that last baby's name. I think themes are fun, we're just going for a "family name" theme. :)
skycheattraffic, I think Kassie and Callie are super cute sister names and not too matchy or theme-y. :)