Replies
I don't like Cian. Better is Lucian.
What about (with meaning):
Vlastimil and Patrick ("patriot")
Vlastislav and Patrick
Peace ruler:
Frederik and Vladan
Frederik and Vladislav
Frederik and Vladimir
Gift by God:
Theodor and Bogdan
Theodor and Bohdan
Theodor and Nathan
Theodor and Natanael
Theodor and Ivan
Yannick and Ivan
Johan and Bohdan
Johan and Natan
Jonatan and Natanael
Victor and Nikola ("victory")
Florian and Kvetoslav ("flower")
Gregor and Ira
Lubor and Ireneus (love and peace)
Lubomir and Ireneus
Henry and Hynek ("ruler's home")
Gil and Liron (joy)
Joachim and Jeremiah
Václav and Boleslav ("more and glory")
Wendelin and Slavoj ("Slavic Guys")
Andreas and Ondrej
What about (with meaning):
Vlastimil and Patrick ("patriot")
Vlastislav and Patrick
Peace ruler:
Frederik and Vladan
Frederik and Vladislav
Frederik and Vladimir
Gift by God:
Theodor and Bogdan
Theodor and Bohdan
Theodor and Nathan
Theodor and Natanael
Theodor and Ivan
Yannick and Ivan
Johan and Bohdan
Johan and Natan
Jonatan and Natanael
Victor and Nikola ("victory")
Florian and Kvetoslav ("flower")
Gregor and Ira
Lubor and Ireneus (love and peace)
Lubomir and Ireneus
Henry and Hynek ("ruler's home")
Gil and Liron (joy)
Joachim and Jeremiah
Václav and Boleslav ("more and glory")
Wendelin and Slavoj ("Slavic Guys")
Andreas and Ondrej
I like it! Cian and Sé (I assume it's pronounced like Shay) are very nice names for twins. I adore Shay for a boy but the Se spelling is new to me.