| Abbreviation | Definition | Source Type | Occurrences |
|---|---|---|---|
| KCD | Codex Diplomaticus Aevi Saxonici, ed. J. M. Kemble, 6 vols., London 1839-48. | source | 874 |
| Historical place-name form | Year and Source | Type of place | County |
|---|---|---|---|
| æt Þwangtune | 11th (13th) KCD 962 | Place | Hertfordshire |
| æt Byrstane | 996 (11th) KCD 696 | Place | Hertfordshire |
| æt Cuðeringcoton | 1002 (c. 1250) KCD 1297 | Settlement | Hertfordshire |
| æt Langalege | c. 1060 (13th) KCD 962 | Settlement | Hertfordshire |
| æt Reodburne | 11th (13th) KCD 962 | Settlement | Hertfordshire |
| æt Tæccingawyrðe | 11th (12th) KCD 1354 | Settlement | Hertfordshire |
| æt Uueatlingaceastre | 996 (13th) KCD 696 | Settlement | Hertfordshire |
| æt Uuincelfelda | 996 KCD | Place | Hertfordshire |
| æt Wadtune | 11th KCD 1354 | Settlement | Hertfordshire |
| æt Westuuican | 996 (13th) KCD 696 | Place | Hertfordshire |
| æt Wilmundeslea | 11th (12th) KCD 1354 | Settlement | Hertfordshire |
| Đerefeld | 1060 (14th) KCD 809 | Settlement | Hertfordshire |
| Aðgiðe | c. 1060 (14th) KCD 864 | Settlement | Hertfordshire |
| Beranlei | c. 1050 (13th) KCD 920 | Settlement | Hertfordshire |
| Brikendune | 1062 (14th) KCD 813 | Settlement | Hertfordshire |
| Byrstane | 996 (11th) KCD 696 | Place | Hertfordshire |
| Cadandune | c. 1053 (c. 1250) KCD 920 | Settlement | Hertfordshire |
| Cuðeringcoton | 1002 (c. 1250) KCD 1297 | Settlement | Hertfordshire |
| Cuðingcoton | 1002 (c. 1250) KCD 1297 | Settlement | Hertfordshire |
| Deccewyrðe | 1066 (14th) KCD 824 | Settlement | Hertfordshire |
| Eslingadene | 11th (12th) KCD 1354 | Settlement | Hertfordshire |
| Fleamstede | 990 (c. 1250) KCD 672 | Settlement | Hertfordshire |
| Hæðfelda | 11th KCD 1354 | Settlement | Hertfordshire |
| Hadham | c. 1060 (c. 1250) KCD 907 et passim | Settlement | Hertfordshire |
| Hicche | 1062 (14th) KCD 813 et passim to, 1428 FA | Settlement | Hertfordshire |
| Huuæthampstede | c. 1066 (14th) KCD 824 | Settlement | Hertfordshire |
| in Deccewyrðe | 1066 (14th) KCD 824 | Settlement | Hertfordshire |
| into Eslingadene | 11th (12th) KCD 1354 | Settlement | Hertfordshire |
| into Hæðfelda | 11th KCD 1354 | Settlement | Hertfordshire |
| into Sancte Albane | c. 1000 (12th) KCD 716 | Settlement | Hertfordshire |
| Keleshelle | 11th (c. 1250) KCD 907, c. 1060 (14th) ElyM | Settlement | Hertfordshire |
| Munddene | 11th (12th) KCD 1354 | Settlement | Hertfordshire |
| on Munddene | 11th (12th) KCD 1354 | Settlement | Hertfordshire |
| on Wealadene | 11th (12th) KCD 1354 | Settlement | Hertfordshire |
| on Welugun | 11th (12th) KCD 1354 | Settlement | Hertfordshire |
| Reodburne | 11th (13th) KCD 962 | Settlement | Hertfordshire |
| Sancte Albane | c. 1000 (12th) KCD 716 | Settlement | Hertfordshire |
| Sticenæce | 1066 (14th) KCD 824 | Settlement | Hertfordshire |
| Tæccingawyrðe | 11th (12th) KCD 1354 | Settlement | Hertfordshire |
| Uerulamium quod nos vulgariter dicimus Wætlingaceaster | 990 (13th) KCD 672 | Settlement | Hertfordshire |
| Uuincelfelda | 996 KCD | Place | Hertfordshire |
| Wadtune | 11th KCD 1354 | Settlement | Hertfordshire |
| Wealadene | 11th (12th) KCD 1354 | Settlement | Hertfordshire |
| Welugun | 11th (12th) KCD 1354 | Settlement | Hertfordshire |
| Westuuican | 996 (13th) KCD 696 | Place | Hertfordshire |
| Wilmundeslea | 11th (12th) KCD 1354 | Settlement | Hertfordshire |