Prince And Pauper has these relationships to other tropes:

parents kids shares a parent with:
Fish Out Of Water
Identical Stranger
Princess For A Day
Swapped Roles
parent child
Fish Out Of WaterBlithe Spirit
''Fish Out Of Temporal Water
''Refugee From TV Land
''City Mouse
''Country Mouse
''Alien Among Us
''Changeling Fantasy
''Freaky Friday Flip
''Mage In Manhattan
''Raised By Wolves
''Rags To Riches
''Rich In Dollars Poor In Sense
''Slept Through The Apocalypse
''Stranger In A Strange School
''Penny Among Diamonds
Identical StrangerCriminal Doppelganger
You'll need to Get Known if you want to add or modify these relationships.