In these parts, only the protestants call it that. I refuse to refer to it in my church by that name.
Ah, Des, "Maundy" is an antique English corruption of the Latin word "mandatum", the first word of a verse from the Gospel in the Vulgate, John 13:34:
Mandatum novum do vobis: ut diligatis invicem ...
"I give unto you a new commandment: that you love one another ..."
You can't really get a whole lot more Catholic than that. "Maundy Thursday" long predates the Reformation.