I found this on Angry Chicken and since we are HUGE Lord of the rings fans I just had to try it! Turns out my name in Elvish is Herenya which is pronounced Hair-ehn-yah.
Kate is Manwathiel prnounced Mahn-wah-thee-ell.
Duane's name is only listed under a different spelling which means something different than what his name means so I chose his middle name which is Mornenion pronounced More-nehn-ee-on
Elijah is Hirnaeranin pronounced Here-nie-rah-neen
Seth is Cilmeon pronounced Kill-mee-on
Try it out and let me know what your Elvish name is!