They’re not biologically related.
England is said to be the son of four siblings, which
includes Scotland, Wales, and Northern Ireland.
“
Yes. Though England is the United Kingdom, when he comes back home, he becomes the fourth son of four siblings. His older brothers, Scotland, Wales and Northern Ireland, are three people.”
Source: Hetarchive, (Bamboo Thicket, eng trans., Aug 4th, 2010)
Ellawritesficssometimes 