Hello Ray - I bought a gallon pot of the Tohono O'odham onions at a Master Gardener sale over on E. Broadway several years ago. I've given away tons of them, even sent some to an onion collector back east.
Are the I'itol's different? I'll have to google both names.
My multiplying onions I got from a Valley of the Sun Men's Garden Club member years and years ago. (It's no longer a men's garden club - that's how long ago - the ladies have taken it over.) Never had a name for those onions. They just look as prolific as those Dann showed.