Complex sentence: His identity is something of a mystery and his name is spelled in many variant forms, and is given as "Brandebourch" by Froissart, and also appears as "Bembro" and "Brembo".
Split into simpler sentences: His identity is something of a mystery and his name is spelled in many variant forms. It is given as "Brandebourch" by Froissart, and also appears as "Bembro" and "Brembo".