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If I was shortening someone's last name to only the first letter, but not doing it for the first name, would I put the dot after the last name or between the first name and the last name?

For example, is it John.C or John C.?

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If you do use a period, it always goes after what is being abbreviated

Dr. (doctor, not to be confused with "drive")
St. (saint, not to be confused with "street")
Ph.D.

However, a period is not always used, especially in BrE, and seems to get dropped from time to time in AmE, for example in addresses.

In your first example, putting the period before the "C" would result in

John .C

since the period is usually not a word delimiter in written English, otherwise it would be

John C.Williams

which would be incorrect, however, there are times it might be formatted as

John C.J. Williams

for contiguous abbreviations.

The famous example which breaks the rules is

Will.I.Am

Formatting the abbreviation as

John.C

looks more programming-ish, "C" is a method for object "John".

protected by Community Oct 3 '18 at 17:47

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