These are all real life sibsets I know, with one of them missing. The ones missing are listed below. Just try and match them up again! Please fill in the blanks in ALL CAPS for clarity. I'll reply to your message, telling you how many you got correct :)
Claire, ___ (m) and Nina
Edgar, ___ (m) and Luc
___ (f), Leslie (f) and Jody (m)
Michel, ___ (m) and Sylvia
___ (m) and Toby
___ (m), Ruben and Bette
Esther and ___ (f)
Antoinette, ___ (f) and Tom
___ (f) and Finn
Girls: ASTRID, GEA, KIM, NOA
Boys: PHILIP, RALPH, RICHARD, ROMAN, RONALD