From Pumsaint, Dyfed to all cities in Hertfordshire starting with letter A
- Abbots Langley, Dyfed
- Adeyfield, Dyfed
- Albury, Dyfed
- Albury End, Dyfed
- Aldbury, Dyfed
- Aldenham, Dyfed
- Allens Green, Dyfed
- Amwell, Dyfed
- Ansells End, Dyfed
- Anstey, Dyfed
- Appspond, Dyfed
- Apsley, Dyfed
- Ardeley, Dyfed
- Ashbrook, Dyfed
- Ashwell, Dyfed
- Ashwell End, Dyfed
- Aspenden, Dyfed
- Aston, Dyfed
- Aston End, Dyfed
- Astrope, Dyfed
- Ayot Green, Dyfed
- Ayot St Lawrence, Dyfed
- Ayot St Peter, Dyfed
- Ayres End, Dyfed