The word "prince" there should not be capitalized, since it's not used as part of someone's title.
"The person who will inherit the throne of England is Prince Charles."
Here, "Prince" is capitalized because "Prince Charles" is someone's title, and as such, a proper noun.
"The song 'Purple Rain' was written by Prince."
Here, "Prince" is capitalized because it's someone's name.
Here are the cases about which I'm uncertain:
Case 1: "Hey, there you are, Prince Ralph. What can I get for you, Prince?" Case 2: "Hey, there you are, Prince Ralph. What can I get for you, my Prince?"
In each sentence, the latter of the two instances of "prince" do not use the full title, but they are used to directly address the prince. Should they be capitalized?
Top answer
" The word "prince" there should not be capitalized, since it's not used as part of someone's title. " Here, "Prince" is capitalized because "Prince Charles" is someone's title, and as such, a proper noun. " Here, "Prince" is capitalized because it's someone's name.
— Clive
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