It seems that the main source for this profile is http://www.germanicmythology.com/FORNALDARSAGAS/ThattrRagnarsSonar....
"Helgi Hvassi, the Sharp, was the name of Gudrod’s brother... Sigurd and Blaeja had a daughter... Aslaug ... she married Helgi Hvassi. Their son was Sigurd Hart."
No mention of any daughters, so who are they and where have they come from?
Specifically looking at Áslaugr Helgadóttir Pam Wilson (on hiatus)?