I would like to know the "Chinese symbols" for my two sons names: Braden & Tandyn.?

When I learned Chinese in grade 9 the teacher gave everyone names in Chinese that sounded very similar to our English ones. My name is Kishaun and my Chinese name is 凯旋 (kǎixuán). Maybe you can talk to someone who speaks Chinese or maybe try speaking to a Chinese teacher at a high school/college.