Hyrulian Hero
Zelda Informer Codger
I prefer the former but preferences have nothing to do with reality. I figure this is a great place to stick a comparison that you could find via a Google search since I can't find a break-down online. Let's break out the text dumps and look into this.
LoZ: N/A
AoL: N/A
ALttP: N/A
LA: N/A
OoT: N/A
MM: N/A
OoS: Hyrulean - 1
OoA: Hyrulean - 1
FS: N/A
TWW: Hyrulean - 1 / Hyrulian - 1
FSA: Hyrulean - 10
TMC: Hyrulean - 9
TP: Hyrulian - 4
PH: Hyrulian - 1
ST: N/A
SS: N/A
ALBW: Hyrulean - 1
TFH: ???*
BotW: Hyrulean - >0
Hyrule Historia: Hyrulean - 2
*I couldn't find a text dump of Tri Force Heroes.
Notice Wind Waker uses both, it seems Nintendo totally cares which way it's spelled.
LoZ: N/A
AoL: N/A
ALttP: N/A
LA: N/A
OoT: N/A
MM: N/A
OoS: Hyrulean - 1
OoA: Hyrulean - 1
FS: N/A
TWW: Hyrulean - 1 / Hyrulian - 1
FSA: Hyrulean - 10
TMC: Hyrulean - 9
TP: Hyrulian - 4
PH: Hyrulian - 1
ST: N/A
SS: N/A
ALBW: Hyrulean - 1
TFH: ???*
BotW: Hyrulean - >0
Hyrule Historia: Hyrulean - 2
*I couldn't find a text dump of Tri Force Heroes.
Notice Wind Waker uses both, it seems Nintendo totally cares which way it's spelled.