What is the implication in "Gerald ‘Mac’ MacLean"?
"Matthew Dimmock and Gerald ‘Mac’ MacLean gave me the benefit of their unrivalled expertise in the field..." (Jerry Brotton, This Orient Isle- Elizabethan England and the Islamic World, Acknowledgements)
Solution 1:
Nicknames are put in quotation marks between the first and last names: Ringgold “Ring” Lardner, William “Bill” Clinton, Joseph “Sleepy Joe” Biden.
Gerald “Mac” MacLean is known to his friends as just “Mac”.