To be fair, she would’ve had the curtesy title Princess Elizabeth of York when her father was the Duke of York, but of course, as we all now know, by the time of the start of WWII, Colin Fir.., ahem, Prince Albert, Duke of York, was King George, so QEII would have been just referred to as Princess Elizabeth.
Naah… she was a subaltern in the Territorial Forces during the war, not a sargent. 
…and was Elizabeth “Monty’s” double.
QE II, if you please.
Even the reasonably well-informed might not have any idea who “Elizabeth of York”
is if the preceding “Her Royal Highness Princess” is omitted.
There is seldom any reason to employ non-standard usage in formal English, and referring
to royalty by first name/last name, as in “Elizabeth Windsor” is not standard. The only case
I definitely recall hearing of this construction being used was during the trial of Louis XVII,
who was referred to as Louis Capet. I believe the Russian revolutionaries may have referred
to Nicholas II as Nicholas Romanov.
Getting back to the thread subject, numerous alternatives are considered standard, e.g.:
Princess Elizabeth
Princess Elizabeth of the UK
Queen (then Princess) Elizabeth II (of the UK)
Heir Apparent Princess Elizabeth (of the UK)
BTW To her credit the young princess made herself useful during the war as a truck mechanic.
Many people know Bush 41 was a pilot who was shot down during WW II. What is not well known is he was nearly captured by the Japanese and taken to an island were many US prisoners were killed and in some cases eaten.
Who doesn’t like to eat Bush now and then?
Quite a few baseball players here, but not as well known as Stan the Man. I have heard of some of these players.
Harry Morgan (Colonel Potter) has IMDB credits into the war years. Not sure how famous he was back then, though.
That’s just the kind of joke those kamikaze cannibals would have made had they gotten their mitts on him.
Esther Williams counts both as a sports figure and celebrity who was famous in WWII, and still somewhat famous today.
I do and I’m fourteen and American.
How about Herman Wouk? He published his first book in 1947 but had started writing it during the war, and had worked as a radio dramatist in the 1930’s.
Considered standard BY YOU - but probably not by anybody who knows what they’re talking about. Certainly Elizabeth II’s reign extends to far more than just the UK.
And I don’t know that she was ever “Hear Apparent” in her lifetime.
Tony Martin was pretty well known back then, and is still with us now, at 97.
Olivia de Haviland was quite well known before and during WWII.
Saw this thread yesterday, and just came across this in a book today:
King Michael of Romania (Well, he would have been a household name in Romania…)
Didn’t have his first popular song until 1951.
Not sure how famous he was at the time, but Les Paul was performing professionally in a band and on the radio, and had put out at least two albums, in the 30s.
Les Paul died in 2009. No Les, no more.