what was the name given to the southern states which joined the confederacy later?

Answer 1

I assume that what you are referring to are ‘rump’ governments. There were three of them, one for the Union and two for the Confederacy. The States under discussion are as follows:

Seven states seceded by February 1861:
• South Carolina (December 20, 1860)
• Mississippi (January 9, 1861)
• Florida (January 10, 1861)
• Alabama (January 11, 1861)
• Georgia (January 19, 1861)
• Louisiana (January 26, 1861)
• Texas (February 1, 1861)
After Lincoln called for troops, four more states seceded:
• Virginia (April 17, 1861) there was also a rump Union government of Virginia
• Arkansas (May 6, 1861)
• Tennessee (May 7, 1861)
• North Carolina (May 20, 1861)
Two more states had rival (or rump) governments. The Confederacy admitted them but they never controlled these states and the pro-Confederate state governments were soon in exile:
• Missouri did not secede but a rump groups proclaimed secession (October 31, 1861)
• Kentucky did not secede but a rump, unelected group proclaimed secession (November 20, 1861)
Both states allowed slavery and both had strong Unionist and Confederate counties, including some Unionist slave-owners. The legalities of the matter remain in dispute to the present day.

Answer 2

All of the states were called the Confederate States of America. The states that left were:
Texas
Louisiana
Mississsippi
Alabama
Georgia
Florida
Virginia
South and North Carolina

Some ppl called them traitors though...... jk!

Answer 3

I don't believe they had a special name. They were all the Confederate States of America.

Answer 4

It's Dixieland. I've just done a crossword which included this clue. I was surprised but it was the only thing that fitted!

Answer 5

States with rump-Union governments.

Answer 6

Late comers... or Johnny come lately...

Other than that, none.