Franciscus "Sus" Leysen
- Born: 1 Feb 1943
- Location: Lichtaart, Belgium
- Died: 15 Dec 2003 (Aged 60yrs)
- Location: Onze Lieve Vrouw Olen, Belgium
- Father: Joannes Franciscus Leysen
- Mother: Dimphna Augusta Wouters
- Sister: Joanna Jan Baptist Maria Leysen
- Brother: Siegfried Leysen
- Brother: Ronald Leysen
- Brother: Eddy Leysen
- Sister: Margaretha Leysen
- Sister: Josepha Leysen
- Brother: Eddy Alfons Maria Leysen