You wouldn't add anything to pluralise the surname Muniz, you could just say "The Muniz are coming over"
If Gelpi is a surname, then the plural is Gelpis.
The plural of the surname may be Simmons or Simmonses.
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.
Winters. Plural of winter is winters. Plural of surname Winters would also Winters. Possessive of winter would be winter's.
The plural of Shastri would be Shastris
If Hoix is a surname, then the plural is Hoixes
If Gelpi is a surname, then the plural is Gelpis.
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.
To make the surname Justiz plural, you would add an "s" at the end. So it would become Justizs.
To pluralize the surname "Fourness," you would simply add an "es" to the end, making it "Fournesses."
The surname Hester has the plural Hesters (two Hesters, or the Hester family).
In English, the plural is Mullinaxes Other languages make plurals differently.
Angelina Muniz's birth name is Angelina Maria Muniz Zagari.