Mathilda von Merseburg, Äbtissen von Herford - Husbands - Married to All??? Can some one help clarify them

Mathilda von Merseburg, Äbtissen von Herford Wife of

1 Theodoric von Sachsen added on March 30, 2017;

2 Walpert, count of Ringelheim;

3 Immed II, Graf in SachsenSon of Walpert, count of Ringelheim and Alburgis of Lesmonia;

4 N. von Werden, Graf von Hamalant Son of Walpert, count of Ringelheim and Alburgis of Lesmonia and

5 Reginhart, count in West Saxony

Mathilde von Merseburg was born about 0840, the daughter of Seigfried von Merseburg and Mathilde von Herefordt. The place is not known.She died about 0915. The place is not known.
Her husband was Immed I von Sachsen. They were married, but the date and place have not been found. Their only known child was Thierry II (0856-0917).
http://www.morganlefay.ca/CD/Richards%20en/INDIs53/II28321.html

Most of what I am finding her is in NON-ENGLISH