People’s opinions? Personally I think these names fit really well.
[name]Kathryn[/name] [name]Sarah[/name] and [name]Matthew[/name] [name]James[/name]
[name]Catherine[/name]/[name]Katherine[/name] would be my preferred spelling. They’re two classic and timeless names so they do have the same style.
I think they fit very nicely together. They’re both classic names. I do, however, prefer [name]Katherine[/name] the spelling.