The plural form of the surname Gillis is Gillises.
To make a surname plural you must add "s" (s) to it, unless the name already ends with an "s", in which case you simply add "es". For example: Smith would be pluralised Smiths, and Jones would be pluralised Joneses.
Just add an apostrophe, like this: "The people to listed all of Jesus' desciples."
Fournesses is the plural of Fourness
Folisis is the plural of Folisi
The word Balsh is a surname, a proper noun. Proper nouns are always capitalized.The Balsh family are the Balshes.
The plural of Shastri would be Shastris
If Gelpi is a surname, then the plural is Gelpis.
If Hoix is a surname, then the plural is Hoixes
The plural of the surname may be Simmons or Simmonses.
The plural of the surname Sarli would be Sarlis.
The plural of bràthair (brother) is bràithrean. (This would not be for the surname Brothers.)
A surname cannot be pluralized.
The plural form of the proper noun Justiz is Justizes.
In English, the plural is Mullinaxes Other languages make plurals differently.
The surname Hester has the plural Hesters (two Hesters, or the Hester family).
The plural form of Hass is Hasses, e.g. All the Hasses were invited to the wedding.
The plural of the surname Windish (name ending in -sh) is Windishes.