<Table> <Tr> <Th_colspan="2"> Saffron Walden </Th> </Tr> <Tr> <Td_colspan="2"> St Mary the Virgin, Saffron Walden </Td> </Tr> <Tr> <Td_colspan="2"> Saffron Walden Saffron Walden shown within Essex </Td> </Tr> <Tr> <Th> Population </Th> <Td> 15,504 (2011) </Td> </Tr> <Tr> <Th> OS grid reference </Th> <Td> TL541387 </Td> </Tr> <Tr> <Th> District </Th> <Td> <Ul> <Li> Uttlesford </Li> </Ul> </Td> </Tr> <Tr> <Th> Shire county </Th> <Td> <Ul> <Li> Essex </Li> </Ul> </Td> </Tr> <Tr> <Th> Region </Th> <Td> <Ul> <Li> East </Li> </Ul> </Td> </Tr> <Tr> <Th> Country </Th> <Td> England </Td> </Tr> <Tr> <Th> Sovereign state </Th> <Td> United Kingdom </Td> </Tr> <Tr> <Th> Post town </Th> <Td> SAFFRON WALDEN </Td> </Tr> <Tr> <Th> Postcode district </Th> <Td> CB10 - 11 </Td> </Tr> <Tr> <Th> Dialling code </Th> <Td> 01799 </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Police </Th> <Td> Essex </Td> </Tr> <Tr> <Th> Fire </Th> <Td> Essex </Td> </Tr> <Tr> <Th> Ambulance </Th> <Td> East of England </Td> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> EU Parliament </Th> <Td> East of England </Td> </Tr> <Tr> <Th> UK Parliament </Th> <Td> <Ul> <Li> Saffron Walden </Li> </Ul> </Td> </Tr> <Tr> <Td_colspan="2"> <Dl> <Dt> List of places </Dt> <Dd> UK </Dd> <Dd> England </Dd> <Dd> Essex </Dd> </Dl> 52 ° 01 ′ 19" N 0 ° 14 ′ 35" E ﻿ / ﻿ 52.022 ° N 0.243 ° E ﻿ / 52.022; 0.243 Coordinates: 52 ° 01 ′ 19" N 0 ° 14 ′ 35" E ﻿ / ﻿ 52.022 ° N 0.243 ° E ﻿ / 52.022; 0.243 </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Saffron Walden </Th> </Tr> <Tr> <Td_colspan="2"> St Mary the Virgin, Saffron Walden </Td> </Tr>

Where does the last name walden come from