I’ve created the Pedigree Sandbox page as a testbed for various pedigree ideas. Right now it’s just a simple table-based layout for two and three generations, at various sizes. And the code for the two-generation one is at the bottom (you can view source for the rest, though there’s not much different about it).

Here’s a two-generation layout:

Pedigree Mockup 1

And three-generation:

Pedigree Mockup 2