There's at least 2 companies that make fabric with a backing that can be put thru an ink jet printer for photos on fabric. They are colorfast & can be gently washed. I did an Americana quilt & incorporated my father from WWII & grandfather from WWI in their army uniforms plus some other pertinent pictures. If you can get photos from the family, scan them into your computer & go from there. It would be so much easier than all those leaves. You might even be able to get them printed at Kinkos or some other professional printers. The fabric comes in 8 1/2 by 11 sheets.
The products are: Printed Treasures by Milliken and Sew-in Colorfast Fabric Sheets by June Tailor. They can be found at JoAnn's or quilt shops. I haven't looked for them at Hobby Lobby or other fabric shops yet. You can print in color, b&w or sepia depending on what works best with the fabrics in the quilt. You could use narrow strips of fabric to join then pictures based on family relationships.