In Croatia, Kniha families are generally Croats (from Rovinj ), very rarely Slovaks (from Nasice ). In the past century, relatively most of Croatian residents bearing this family name were born in Nasice and Pula. In Martin in Nasice every fiftieth inhabitant had the family name Kniha.
Prevalence
About 20 people with faimily name Kniha live in Croatia today, in 8 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in only five naselja i to in Rovinj (<10), Nasice (<10), Kampor on the Island of Rab (<5), Martin (<5), and in Breznica Nasicka in Nasice area (<5).
Outside Croatia
Family name Kniha (including: Knichala , Knycha and Chinitha ) is present in 10 countries on four continents.