the plural suffixes for classes can also apply on proper nouns, with the following rules. Proper nouns take the plural endings of corresponding common nouns. For example:

- names of people or deities take the class 2 -r suffix in plural

- names of animals take the class 4 suffix -sh in plural

- names of tangible inanimate objects(or names indicating objects with unknown tangibility) take the class 10 suffix -t in plural

- placenames take the class 13 suffix -f in plural