Hi, Zaheer,

'Bastard' was a derogatory term for a person born of parents not married to each other. You can find the information, 'How did William the Bastard become William the Conqueror?', here: <a href="https://www.bbc.com/timelines/zp88wmn" style="background-color: rgb(255, 255, 255);">https://www.bbc.com/timelines/zp88wmn</a>;.

I hope this helps!