If a person's name ends with "the third," do you capitalize "third?"

Yes, but it would be preferable to use the Roman numerals (III in this case) after the name.

DrWLS is right. Here's an example:

Richard III

John Edward Jones III

See?

To determine whether to capitalize the word "third" in a person's name ending with "the third," you can follow these steps:

1. Start by checking if the name is written with or without Roman numerals. If the name includes Roman numerals, such as "John Edward Jones III," then the Roman numeral itself (III) is capitalized, but the word "third" is not. It would be written as "John Edward Jones III."

2. If the name is written without Roman numerals, such as "Richard the third," then the word "third" is typically capitalized. It would be written as "Richard the Third."

Remember that style guides may have different rules, so it's always a good idea to consult the specific style guide or guidelines you are following to ensure consistency.