<P> Motto: CORDA SERRATA PANDO . (from Latin: "I open locked hearts"). </P> <Tr> <Td> Logan </Td> <Td> </Td> <Td> Crest: A passion nail piercing a human heart, Proper . <P> Motto: HOC MAJORUM VIRTUS . (from Latin: "This is valour of my ancestors"). Badge: furze </P> </Td> <Td> Chief: none, armigerous clan . </Td> <Td> </Td> </Tr> <P> Motto: HOC MAJORUM VIRTUS . (from Latin: "This is valour of my ancestors"). Badge: furze </P> <Tr> <Td> Logie </Td> <Td> </Td> <Td> </Td> <Td> Chief: none, armigerous clan . </Td> <Td> </Td> </Tr>

Who was the most powerful clan in scotland