Hedwig was born in 1050 in Formbach, Germany.1 She died at the age of 38 in 1088.2
General Notes
Notes from http://www.news2mail.com/soc/genealogy/medieval_messages.html#<000001c53730$f0aacb10$8a0c020a@MyNotbook>
Duvernoy was the first to give Hedwig of Formbach as the first wife of Duke Thierry and mother of Duke Simon, in an appendix to the first part of his catalogue originally published in 1912. [Emile Duvernoy in _Catalogue des actes des ducs de Lorraine de 1048 à 1220_ (Nancy, 1915).]