A new this or that game! Pick your favourite between the given origin and diminutive, then leave a set for the next poster.
The “origin” doesn’t have to be The Original, you can say “Katherine or Kitty” instead of “Aikaterina or Kitty” if you prefer. Diminutives can be flexible too, like nicknames with multiple first names, Anglicized spellings, etc.
poster 1
Katherine or Katie?
poster 2
Katherine
Robert or Robin?
First off,
Robert or Robin?
[name_u]Robert[/name_u]
[name_f]Sarah[/name_f] or [name_f]Sally[/name_f]?
Sarah
Eleanor or Nellie?
[name_f]Eleanor[/name_f]
[name_f]Matilda[/name_f] or [name_f]Maud[/name_f]?
Matilda
Wilhelm or William?
[name_m]Wilhelm[/name_m]
[name_f]Marguerite[/name_f] or [name_f]Daisy[/name_f]?
Probably not so interesting to anyone other than me, but the first 3 names & replies amused me as I’m living with [name_f]Sarah[/name_f], who’s children are [name_f]Katherine[/name_f] and [name_u]Robert[/name_u] - so it’s sweet to see those as the preference between origin and diminutive!
[name_f]Daisy[/name_f] 
for a first name, [name_f]Marguerite[/name_f] 
as a middle name
[name_f]Amabel[/name_f] or [name_f]Mabel[/name_f]?
[name_f]Amabel[/name_f].
[name_m]Matías[/name_m] or [name_m]Mateo[/name_m]?
Matías
Aemilia or Emily?
[name_f]Emily[/name_f]
[name_f]Katherine[/name_f] or [name_f]Kate[/name_f]?
[name_f]Katherine[/name_f] 
[name_f]Ruth[/name_f] or [name_u]Ruby[/name_u]?
Ruby
Elizabeth or Elise?
[name_f]Elizabeth[/name_f]
[name_f]Isabella[/name_f] or [name_f]Belle[/name_f]?
[name_f]Isabella[/name_f]
[name_f]Margaret[/name_f] or [name_f]Mae[/name_f]?
[name_f]Mae[/name_f]
[name_u]Artie[/name_u] or [name_u]Arthur[/name_u]?
Arthur
Thor or Thursday?
[name_m]Thor[/name_m]!
[name_f]Mary[/name_f] or [name_f]Polly[/name_f]?
Mary
Brígid or Bridget?
[name_f]Bridget[/name_f]
[name_u]Henry[/name_u] or [name_u]Harry[/name_u]?
[name_u]Henry[/name_u] 
[name_u]Finn[/name_u] or [name_u]Finlay[/name_u]?