There are two accepted forms that show possession for singular nouns ending in s:
Add an apostrophe (') after the existing s at the end of the word: Atticus'
Add an apostrophe s ('s) after the existing s at the end of the word:
Atticus's
Examples:
Atticus' children are Jem and Scout.
Atticus's children are Jem and Scout.
Bacillus atticus atticus was created in 1882.
Atticus is older than Aunt Alexandra. Atticus is the father of Scout and Jem, while Aunt Alexandra is Atticus's sister.
Atticus Shaffer's birth name is Atticus William Shaffer.
The correct plural of Finch is Finches. It is not Finch's as is commonly thought, as an an 's marks a possessive, as in "The Finch's Car". However, "Jem and Atticus are both Finches." is the correct plural.
Atticus is reelected as a state legislator.
Atticus. has written: 'Le \\'
Atticus Ross is 6'.
Atticus's nickname is "one shot" finch.
Atticus is Jem and Scout's father.
Atticus Kodiak was created in 1996.
Herodes Atticus was born in 101.
Atticus Circle was created in 2004.