Here's a fun quiz that I've linked before: https://www.sporcle.com/games/silverwind/ffsummons/
And the top 10 results:
Shiva - 93.3%
Ifrit - 91.7%
Choco - 91.3%
Bahamut - 90.5%
Odin - 85.4%
Chocobo - 81.4%
Leviathan - 80.9%
Ramuh - 78.5%
Titan - 71.6%
Alexander - 69.6%