Mạc dynasty
During the decline of the Mạc dynasty at the end of the 16 century, Mạc Mậu Giang as the son of king Mạc Phúc Nguyên, went to Nghệ An seeking refuge. To avoid political persecution, Mạc Huyền Nhai as the son of Mạc Mậu Giang marked the beginning of Phan (Đăng) as the adjusted surname of this lineage in Yên Thành District, Nghệ An province; "Đăng" being a connotation to the founder of the Mạc dynasty, Mạc Đăng Dung. Phan Đăng Dư is a descendant of Mạc Mậu Giang in the 14 generation. Furthermore, this lineage may be traced back as far as to the renowned 13 century Confucian scholar Mạc Đĩnh Chi under the Trần dynasty, who himself was a descendant of another renowned 11 century Vietnamese scholar under the Lý dynasty.