What is the plural possessive of Lois and why?

Answer 1

The plural possessive form of "Lois" is "Loises'." This is because "Lois" is a plural noun, so to indicate possession by multiple Lois entities, you add an apostrophe after the plural form "Loises." The apostrophe comes after the "s" because the plural form already ends in "es."

Answer 2

The plural form for the proper noun Lois is Loises.

• singular nouns ending in 's' form the plural by adding 'es' to the end of the word.

The plural possessive form is Loises'.

• plural nouns that end in 's' add an apostrophe after the ending 's' to form the possessive.