the saltire 1924
The united Kingdom flag was formed with the union of three 'nations'. England, Wales and Scotland. It was the merging of the 'nations' flags which formed the Union Jack and Britain.
The union Jack
National labor union
1757
The Union Jack and the Union Flag are the same thing, both names are acceptable. Some people will say that the term, Union Jack, should only be used when the flag is flown on Royal Navy ships, but this is incorrect. the Flag Institute has a full explanation, see their website, search for 'the flag institute'
Union Flag, or more casually the Union Jack
The Union Jack was formed when England and Scotland joined to become Britain (they joined when James I became king). At this time Wales was part of England so was not recognized as a separate country.
The Union Jack is the nickname of the UK flag.
The canterbury rugby union was formed in 1879 and governs the sport of Rugby Union in parts of New Zealand. It was the first such organization in New Zealand.
The union jack on the Australian Flag is from the first white people to settle on our land, the British. The British flag is JUST the union jack, so, to celebrate the people who first settled in Australia, we have their flag in part of OUR flag. Hope that helps :)
If you're talking about Margaret the first, she formed the Kalmar Union with Norway and Sweden during the 15th century.
I'm not sure what you mean by 'special name', but the official name for the British flag is: Union Jack