<Tr> <Td_colspan="2"> </Td> <Td> </Td> <Td> </Td> <Td_colspan="2"> </Td> <Td> </Td> <Td> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td> </Td> <Td> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td> </Td> <Td> </Td> <Td_colspan="2"> </Td> <Td> </Td> <Td> </Td> <Td_colspan="2"> </Td> <Td> </Td> <Td> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td> </Td> <Td> </Td> <Td_colspan="2"> </Td> <Td> </Td> <Td> </Td> <Td_colspan="2"> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td> </Td> </Tr> <Tr> <Td_colspan="6"> Prince William, Duke of Cambridge </Td> <Td_colspan="2"> </Td> <Td_colspan="6"> Catherine, Duchess of Cambridge </Td> <Td_colspan="2"> </Td> <Td_colspan="6"> Prince Henry of Wales (Prince Harry) </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="2"> </Td> <Td_colspan="6"> Princess Beatrice of York </Td> <Td_colspan="2"> </Td> <Td_colspan="6"> Princess Eugenie of York </Td> <Td_colspan="2"> </Td> <Td_colspan="6"> Lady Louise Windsor </Td> <Td_colspan="2"> </Td> <Td_colspan="6"> James, Viscount Severn </Td> <Td_colspan="2"> </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr>

When did the house of windsor come to power