|Full name||Hernaín Arzú Güity|
|Date of birth||13 October 1967|
|Place of birth||, Honduras|
|2012||Alianza de Becerra|
* Senior club appearances and goals counted for the domestic league only.
Hernaín Arzú Güity (born 13 October 1967) is a retired Honduran football player who made his name with the national team in the 1990s.
Arzú made his debut for Honduras in a June 1992 friendly match against Panama and has earned a total of 36 caps, scoring no goals. He has represented his country in 6 FIFA World Cup qualification matches and played at the 1995 and 1997 UNCAF Nations Cups as well as at the 1998 CONCACAF Gold Cup.
His final international was a February 1998 CONCACAF Gold Cup match against Mexico.