That's the first time I see Dijkstra's name written "Edgar" instead of "Edsger", though it's also written that way (superimposed on the original paper - but not

That's the first time I see Dijkstra's name written "Edgar" instead of "Edsger", though it's also written that way (superimposed on the original paper - but not in the original paper) in the PDF. This is especially strange since the link points to a web page at the dutch "Centrum Wiskunde & Informatica" (cwi). So is this just a typo?