Marienna Jensdatter
- resident of Darton
- formerly or alternatively known as Maireagh no Mulvaney ui Neill
- formerly or alternatively known as Marina Jensdatter - see device in Lochac Roll of Arms
- formerly or alternatively known as Marienna Jensdottir
- formerly or alternatively known as Muireann inghean Eoghain ui Maoilmheana
- 257th in sequence in the Order of Precedence
- Ruled as Baroness of Ildhafn with Baron Asbjørn Pedersen Marsvin from 21 June 2003 to 6 November 2004
Award of Arms - 19 November 1994
Dolphin of Caid - 17 March 1996
Harp Argent of Caid - 7 February 1998
Lux Caidis - 19 March 2002
Crescent of Caid - 19 March 2002
Pelican - 22 November 2003
Court Barony - 6 November 2004
Laurel - 7 May 2005
Lord / Lady of Lochac - 6 January 2007
Rowan - 6 July 2007
Lord / Lady of Lochac - 4 July 2009