In my new book, the main character's name is Stacey. Her brother, Toby, is unable to pronounce her whole name and calls her "acey". When writing her name in his speech, I would use an apostrophe to show that the letters 'st' are missing. The question is whether to then use a capital 'a' or not... 'acey or 'Acey?
I am tempted to use 'acey because the apostrophe shows that the capital letter 'S' is missing. I believe that the rule would be the same as a missing 'H' in 'enry - which I think would be correct.