It is not clear if Simon III actually was a Seigneur of Commercy, but at least the title came to his descendants.

The County of Saarbrücken was given to the eldest sister Loretta (d.1270), with the others getting a share, but at her death the title went to Mathilde.

As a widow Mathilde remarried in c.1248 to Amadeus (fr) (d. 1280), Seigneur (lord) of Montfaucon and had more children.

Simon married twice and founded the House of Saarbrücken-Commercy (fr), having both fiefs as inheritance in 1274.

), daughter or granddaughter of his uncle Gaucher II of Broyes-Commercy (fr) (d. 1308), married to Marguerite of Bellevesvre (c. 1225 - a.