The Kačić's family can be traced to the
Pacta conventa, an agreement dating from 1102 (or later), according to which the Kačićs were one of the twelve Croatian noble tribes (genus) who accepted the Hungarian king
Coloman as the new king of Croatia. They were represented by
comes Juraj Kačić (
Comittem Gurram de genere Chaçittorum). According to the
Supetar Cartulary, they were one of six tribes which selected
bans who, in turn, elected a new king in a case where the prior king died without leaving heirs. Some historians argued that the Croatian rex Slavac and other nobles with the title of
Marianourm and
Morsticum, often argued to be related to the
Narentines, mentioned in the cartulary were originating from the tribe of Kačić. The first mention of Kačićs is considered 1165, when the Byzantine chronicler
John Kinnamos said that 57 cities in Croatia and Dalmatia as well the "nation Kačićs" came under the Byzantine rule. The Kačićs were mostly recorded in the scope of sales contracts and lands disputes, or as witnesses. In 1182, the first explicitly mentioned noblemen as members of the genus Kačić are Miroš Kačić (1166–82) and his son Dobroš, previously also Miroš's father Toljen (1164–66), the judge of Tinj, Toliš Kačić with sons Juraj and Deško, Premko Kačić with sons Dragoš and Pribislav, and likely Otra with his son Dragoslav. The Kačić family originated in the Zadar hinterland near the
Krka river, and when King
Petar Krešimir IV mastered the
Pagania, some members of the family likely relocated to the area between the
Cetina and
Neretva rivers. The social distinction between
noble Kačićs in the Zadar-Biograd hinterland and the
princely (knezes) Kačićs from Omiš remains uncertain, but the two families are considered to be related. The clearest established connection is the noble Hodimir, mentioned in 1207 in a charter of St. Peter's Church in Bubnjani near Tinj, whose son Nikola was an Omiš knez. In the 12th and 13th centuries Kačićs possessed lands in the Zadar hinterland, in the wider area of Tinj,
Nadin, Kačina Gorica, Kokićani and Kamenjani. From the mid-14th to 15th century, their holdings expanded to include Podnadin, Bistrovina, Butina, Kačina Gorica, Suhovaram, Grguricavas and Krneza, and the wider area around those villages. The center of the genus was in Nadin, for some Zadar,
Nin and possibly
Pag, where "
dominum Caçigh" is mentioned. According to M. Marković, in the early 11th century, the lands West of Nadin were ruled by the tribe
Lapčan, while in the East by family Kašić. The family name of the Kačićs can be found in the
toponyms Kačina Gorica, Kačišćina (alleged second name for Bistrovina), Kačićić (
Chacichich) and Kačić (
Cacich). In the 14th century the family members began to identify themselves by family names with the adjective "de generatione Cacich". In the next period the Kačićs can be traced through three families. In the 15th to 17th centuries a branch settled in the wider area of
Cazin and
Bosanska Krupa, where in 1487 there was a dispute between them and the
Babonić noble family. The last mention of Nadin Kačićs dates back to 1527, when Šimun (Simon) was in the citadel of Zadar, after pressure from the Ottoman conquest. ==Omiš branch==