E.g. as in 中华 or 华语, and other similar words.
In 春秋左傳 (722/468 BCE). http://ctext.org/chun-qiu-zuo-zhuan has the statement 楚失華夏.
Huaxia used to denote tribes that later became the Han people, and later the term shifted to symbolize China. Hua is the beautiful clothes worn by the Chinese, xia is for the grandness of the culture.