9.1a Original pronunciation must be maintained.

In general, initial-letter contractions are used both as whole words and as parts of words when they retain their original sound. Thus initial-letter contractions are used in the following examples:

ye(st)(er)(day)(ever)y(where)cl(ever)s(ever)al
gr(and)(father)ad(here)sun(know)nl(and)(lord)
s(mother)(ed)re(name)d(question)naire b(right)
(time)rm(ar)i(time)(th)(under)(work)(ing)
(young)(st)(er)(there)by (character)i(st)ic(through)(ou)t
(where)(upon)(ought)n`t(for)e(word)(had)n`t
(here)'ll(spirit)ual(under)(world) (their)s
(part)y(wh)ole(some)(some)(time)G(er)(many)

As long as the original sound of the word is maintained, initial-letter contractions are used in proper names, as parts of hyphenated compound expressions, and in dialectal words containing an apostrophe. Examples:

Doubleday's Happy-Times Child Care

G'day, m'lord