Queen Elizabeth II is not directly related to Richard III. Richard III was a member of the House of York, which was part of the Plantagenet dynasty. He ruled England from 1483 until his death in 1485. Queen Elizabeth II, on the other hand, is a member of the House of Windsor, which traces its lineage back to the House of Hanover and the House of Saxe-Coburg and Gotha.
However, there is a distant connection through marriage. Queen Elizabeth II is a descendant of Henry VII, who defeated Richard III at the Battle of Bosworth Field in 1485. Henry VII married Elizabeth of York, who was Richard III’s niece. This marriage united the Houses of Lancaster and York, effectively ending the Wars of the Roses. Through this lineage, Queen Elizabeth II has a distant familial link to Richard III, but it is not a direct blood relation.