Ellen Burns has a "4 Sister's Quilt" but I don't recall if the individual blocks have that name. I'd check out a quilt block library, or even the Quilter's Cache to see if I could find one. I suppose you could also just Google: "Sister's Quilt block", or something like that. If all sources run dry, why not make your own quilt block and name it whatever you want! Just a thought. Or you could combine elements of two or more blocks and then re-name it for your sister.