New History of the Five Dynasties
According to "Từ điển Bách khoa toàn thư Việt Nam", the date of birth of Kiều Công Tiễn was unknown but he was from Phong Châu (now Phú Thọ, Vietnam) where he was a notable of the region. Commonly, the Hán tự characters of his name (矯公羨) are transcribed in Vietnamese as Kiều Công Tiễn but there are some sources such as the "Khâm định Việt sử thông giám cương mục" or the "Việt Nam sử lược" of Trần Trọng Kim use the transcription Kiểu Công Tiện. In several ancient historical books of China like the "New History of the Five Dynasties", his family name (矯, "Kiều") was recorded by another character 皎 which is often transcribed as "Hiệu" in Vietnamese.