From '1500 California Place Names,' etymology of "Ycatapom" states that the Wintu word wayk'odipom means "north step place (whatever that means!)." Nice page.
Just want to add something here. You will see on most maps a nice-looking route that cuts over from I-5 near Castlella to Hwy 3 just north of Coffee Creek. If you are coming from the north, you will be tempted to take this road rather than getting on Hwy 3 all the way up in Yreka. DO NOT give in to this temptation! What looks like a good road on the map is in reality a 2.5 hour trip on winding, rough, unmarked gravel and dirt roads. If you are really want to drive this road, do it on the way back!
Actually Steve and I did the first ascent in the late 90's. Forget the pins and take several small nuts. When we did the route many of the small cracks were full of dirt. Since then the cracks have become cleaner. A good route on good rock. Cheers, Bruce