This key explains how to interpret the following index on names of brides and grooms in the Chubut Colony, and contains a wealth of information on families.

The index is split into two groups - grooms and brides. Each index is identical to the other, and both are listed alphabetically (but are not further separated into date order). The headings are quite obvious, and list the following:

• name of groom, and sometimes age
• names of groom's parents (usually only first names), each name separated by commas
• name of bride, and sometimes age
• names of bride's parents (usually only first names), each name separated by commas
• date of marriage
• reference - each entry has a reference which is the volume and folio reference to the official registers in Rawson, (except the diary of R J Berwyn and the Vrondeg Church records, copies of which are held in the Gaiman Museum). The references are as follows:

Other information is also sometimes included, denoted by the following symbols:

• * = denotes the name of the bride/groom's first husband/wife - these references follow under the name of the bride or groom
• (...) = place of birth eg (Denbigh)
• "....." = property name or place of association in the Chubut Valley, eg. "Drofa Dulog"
• (FRA) = France
• (BOLIV) = Bolivia