It depends. If you are a traditional grammarian, James Otis's. If you have evolved and prefer berevity and shun redundancy, James Otis'.
True. How to pronounce. Otis's should be prononouced as Otisiz. (with an extra syllable)
The singular possessive form is heart's; the plural possessive form is hearts'.
The plural of rose is roses. The plural possessive is roses'.
The plural possessive is governesses'.
To form the plural, you would add an "es" to the end of James. Then add an apostrophe after the "es" . It would look like this: Jameses' . By making this plural possessive you are saying that there is more than one James that are possessive of something. Say there is a meeting with two employees that are partners and both of their names are James. You would say Jameses' salaries have seen an increase of 2% in the past 6 months.
Possessive for sofa is sofa's. Plural for sofa is sofas. Plural possessive is sofas'.
The plural form of the noun grandson is grandsons.The plural possessive form is grandsons'.Example: My grandsons' names are James and Jamal.
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
The plural is lads. The plural possessive is lads'.
The plural is relatives. The plural possessive is relatives'.
The plural form is suffixes. The plural possessive is suffixes'.
The plural form is stepsisters. The plural possessive is stepsisters'.
The plural form is Mexicans. The plural possessive is Mexicans'.
The plural form is echoes. The plural possessive is echoes'.
The plural form is inches. The plural possessive is inches'.
Studies' is the plural possessive of study.
The plural possessive is pals'.
Coaster's is singular possessive. The plural is coasters, the plural possessive is coasters'.