And the "Pentium" itself, arguably, being a "penta-" name coming after the 80486. But the Pentium broke the numbering scheme to an extent, with the Pentium Pro

And the "Pentium" itself, arguably, being a "penta-" name coming after the 80486. But the Pentium broke the numbering scheme to an extent, with the Pentium Pro wedged between the Pentium and Pentium II.