Both are technically correct, but the choice depends on the style guide you're following: 1. Donna Davis's * Preferred in most modern styles, like APA, Chicago, and MLA. * Example: "Donna Davis's family keeps hawks." 2. Donna Davis' * Used in older or more traditional styles, or when trying to keep it simple, especially with names ending in "s." * Example: "Donna Davis' family keeps hawks." For clarity and modern usage, Donna Davis's is generally better.

In American English, both are acceptable. The American Press Style book says no s and the the Chicago Manual of Style says add an s.

No 1 is correct. Because ‘Davies’ is a last name it is a proper noun. The rule for proper nouns is that you add an apostrophe and ‘s’ to the end even if the name ends with s or z.