In-Hyun is not a popular first name. It is more often used as a unisex (male and female) name.
First names and their meaning - Page 10985
Inie
Inie is not a popular first name. It is more often used as a girl (female) name.
Iñigo
Origin: Basque. 
For the cyclone, see Cyclone Inigo. Inigo derives from the Castilian rendering (Íñigo) of the medieval Basque name Eneko. Ultimately, […] 
Íñigo
For the cyclone, see Cyclone Inigo. Inigo derives from the Castilian rendering (Íñigo) of the medieval Basque name Eneko. Ultimately, […]
Inizio
Origin: Basque. 
Inizio is not a popular first name. It is more often used as a boy (male) name. 
Iñizio
Origin: Basque. 
Iñizio is not a popular first name. It is more often used as a boy (male) name. 
In-Jae
In-Jae is not a popular first name. It is more often used as a boy (male) name.
Inkmar
Inkmar is not a popular first name. It is more often used as a boy (male) name.
Inko
Origin: Basque. 
Inko is not a popular first name. It is more often used as a boy (male) name. 
In-Kyu
In-Kyu is not a popular first name. It is more often used as a boy (male) name.