All of them
3 state capitals have 5 letters: · Boise, Idaho · Dover, Delaware · Salem, Oregon
The capital that has only 3 letters is "Rome" which is the capital of Italy.
The capital with three double letters is Addis Ababa, the capital city of Ethiopia. The name features double "d," double "s," and double "a." This unique characteristic makes it stand out among world capitals.
Edo
Salt Lake City , Utah .
Letters-xy and v but I'm not sure
ORE-IDA
i think no
H, I, and O
Ohio
They all have 3 letters, but "red" and "tan" have exactly 3 letters.
The actor and presenter you are referring to is "Matthew Fox." He has a first name with 7 letters and a surname with 3 letters.