Thijs is prn TYCE like as in Tyson. Its the Scandinavian form of Mathew. Carys is prn Ca-riss, the ca sound like the 'ca' in Cat. Its Welsh and means 'Love'.

Although Im thinking of considering Imogen as a girls name too lol As for Thijs, Dh isnt sure on it sooooooooooo its not set in stone anymore either *sigh*