"Yamato" in Yamatonoaya meant "east (東)" in
Old Japanese as seen in the older spelling of the clan name, thus, "Yamato no Aya" meant "Aya clan of the east". The word "Aya", written as "漢 (Kan; かん)" in
''on'yomi'', does not have a native Japanese etymology and scholars suspect it to be a loanword from a different language. Modern Japanese historians theorize that Yamatonoaya clan and its founder Achi no Omi, originated from the
Kaya confederacy, specifically from the kingdom of "Aya (安邪)" or "Anra (安羅)" (old name for
Ara Gaya) where the placename became the etymology of the Aya clans. According to the theory, the immigrants brought many Paekche technologies from Ara Gaya In recent times, the character for "Aya (漢)" is analogous with the ancient Han dynasty, hence why the character is heavily associated with China today. However, looking at the character's etymology, it is believed to have been used more leniently than its modern equivalent. The pronunciation of "Aya (あや)", as mentioned above, is believed to have derived from the "Kingdom of Aya (安邪国)" and was only given the character of Han (漢) later on. Similar to "Hata (はた)" being written as "Qin (秦)" but having roots in the
Koreanic word "Pada/Hada (波多)", and "Kara (から)" being written as "Tang (唐)" but having roots in the "
Kingdom of Kara (加羅国)", it is believed to have been directly associated with Korean kingdoms at first, then later expanded to China over several millennia,
adopting different characters and interchanging when necessary. Similar usage of Chinese characters has been observed in Korean as well, with Koreans using "Han (韓; 漢; 幹; 刊)" to represent the native word "Han (한)" meaning "big" or "grand" using the
Idu system. Interestingly, the native Korean word "Han" which is directly associated with the
Samhan or "three Hans" of Korea, is believed to be the root of the word "Kara" in Japanese as the word "Han" would have been pronounced as "Kar" in
Old Korean. Therefore, pronunciations such as "Aya; Hata; Kara" (despite stemming from different roots) were likely brought over by Korean immigrants, whose descendants later incorporated more influential characters to better represent themselves. == Relations with the Aya clans ==