Ji Yun (Collection of Rhymes), annotated as he plus jia, pronounced xia. It means throat. It is also annotated as xu plus jia, pronounced xia. The meaning is the same. In the Taixuan Jing (Taixuan Jing) by Yangzi, it is written as he-hu, read in this way by Song Weigan. Zi Collection, Upper Volume Radical: Mouth (kǒu) Page 187, Entry 12