Question from Doreen - Sir David Tudor son of Owen Tudor

Catherine of Valois second husband was Owen Tudor to whom I have traced my ancestry. They had a number of children the two prominent ones being Jasper, Duke of Bedford and Edmund, 1st Earl of Richmond, the father of Henry VII. After Catherine of Valois died Owen Tudor (English version of his name) had a child with an unknown woman who became known as Sir David Fychan Tudor. He was recognized by his half brothers, Edmund and Jasper and was the Uncle of Henry VII. What role did Sir David play if any at the court of Henry VII. How is Sir David Owen Tudors lineage recognized, if at all, in relation to the royals as a half brother? What would my relationship if any to the Tudors be?

Question from Kevin - Elizabeth I's Royal Chaplains

Is there a record of the Royal Chaplains appointed by QE I?