The Children of the Watch, or simply the Watch, was, as recounted by Bo-Katan Kryze, a Mandalorian cult of religious zealots that followed the Way of the Mandalore, which had fallen out of the mainstream Mandalorian society. The Fighting Corps were members of the Children of the Watch but also bore the symbol of Death Watch.
Din Djarin was a Child of the Watch, having once believed that all Mandalorians were like him.