Baa, baa, black sheep, Have you any wool?

[INSERT REALLY LOUD CRASHING NOISES AND MAYBE A RECORDING MACHINE FLYING OUT OF A WINDOW HERE]

Pixiv Tags
【Holy Roman Empire】
Country Name:神聖ローマ(Holy Roman Empire)
HRE's group tag (Major):
・ゲルマン一家(German family) =Germany&Prussia&Austria＆UK&Switzerland&Liechtenstein&Sweden&Denmark&Germania&HRE
・初恋組(first love pair) =HRE&Chibitalia
HRE's group tag (Minor):
・ほんわか一家(A peaceful and pleasant family) =Italy&HRE&Hungary&Austria

- Added:
・新芋兄弟 (HRE, Prussia & Germany)
・黒鷲主従 (HRE & Duchy of Prussia)
・神ロ (Another HRE tag)

Taken from here.