Kauan is of Brazilian origin, derived from an indigenous Tupi-Guarani word meaning "sea". It is pronounced /ˈkaʊ.ɑn/ in the International Phonetic Alphabet. The name has gained popularity in Brazil and among Brazilian communities abroad, particularly in countries with significant Brazilian immigration such as the United States and Japan.
"The name Kauan experienced its peak popularity between 2006 and 2009, with a total of 148 births during these years. However, there has been a significant decline in its usage since then, with only 7 births recorded in 2023."