* Brayden: ברדן (Barden) is a common and relatively accurate phonetic rendering. ברתן (Braten) is another possibility.
* Kash: קש (Kash) is a direct transliteration, and works well.
* Peters: פיטרס (Peters) is the most straightforward transliteration. It's already easily readable in Hebrew.
Therefore, a possible full name in Hebrew could be: ברדן קש פיטרס (Barden Kash Peters).
Other variations are possible depending on desired pronunciation and level of accuracy. For example, one could use a slightly different spelling for Brayden to better reflect the pronunciation in Hebrew. If accuracy is paramount, consulting with a native Hebrew speaker would yield the most appropriate rendering.