What does Kiliānus mean in Latin?

Kiliānus, a proper noun, means “A masculine given name”.

What is the genitive of Kiliānus?

The genitive singular is Kiliānī. Kiliānus is masculine, second declension.

proper noun · masculinesecond declension

Kiliānus m sg (genitive Kiliānī)

Ecclesiastical[ki.liˈaː.nus]

A masculine given name
Domaratus, Kilianus subiudices1254, Album Palaeographicum, published 1935, XIV, 28:

From Old Irish Cillín (“Killian”).

What does Kiliānus mean in Latin?: Kiliānus, a proper noun, means “A masculine given name”.
What is the genitive of Kiliānus?: The genitive singular is Kiliānī. Kiliānus is masculine, second declension.