Alec Lightwood

Alexander Gideon Lightwood-Bane, also known as Alec Lightwood, is the husband of Magnus Bane, the adoptive brother and parabatai of Jace Herondale, and the adoptive father of Rafael and Max Lightwood-Bane, so subsequently the adoptive grandfather of his children, Aidan, Nathan, Theo, Joshua and Emily. This also makes him the father-in-law of Holly Lightwood-Bane.