The source for Danp is this line from Ynglingatal, when speaking of the Swedish kings:

"Dygve's mother was Drott, a daughter of King Danp, the son of Rig, who was first called "king" in the Danish tongue. His descendants always afterwards considered the title of king the title of highest dignity. Dygve was the first of his family to be called king, for his predecessors had been called "Drottnar", and their wives "Drottningar", and their court "Drott". Each of their race was called Yngve, or Yngune, and the whole race together Ynglinger. The Queen Drott was a sister of King Dan Mikillati, from whom Denmark a took its name"

Title: Ancestral File (R)
Author: The Church of Jesus Christ of Latter-day Saints

Publication: Copyright (c) 1987, June 1998, data as of 5 January 1998

Title: International Genealogical index

Author: The Church of Jesus Christ of Latter-day Saints

Record submitted after 1991 by a member of the LDS Church to request LDS temple ordinances. Text: Danp Rigsson; Male; Sealing to Spouse: 04 APR 1996 SLAKE; Danpi Mrs Ringsson; Spouse: Danpi M

Personregister fra Sagaen [http://www.olhov.net/sn_ag.html]

Barn:
Drott Danpsdatter, född cirka 365, död cirka 437