England’s Immigrants 1330 – 1550 Resident Aliens in the Late Middle Ages
| Surname: | Martyn |
| Forename: | John |
| Gender: | Male |
| Place of Origin: | Bermeo (Bermeu), Castile [modern: Spain] |
| Origin: Nationality: | [Castilian] |
| Duration of letters: | 1 year |
| Occupation(s): | merchant |
| Original Document: | CPR 1350-4, p. 421 (letters of protection, 20 March 1353) |
| Notes: | In the dominion of the king of Castile. Part of the Basque Country. |
| Biographical Notes: | No Notes |
| Relationships: | No Relationships |