Why? All Nvidia Tegra chips have codenames based on Marvel and DC comic book characters. Tegra X1 Codename is Logan (Wolverine), while Mariko is one of Logan's love interests, so it makes sense for the codename of a Tegra X1 revision to be a character who was close to Logan in the comics.
Oh that's even worse. I thought it was a play on words for Mario. Not a marvel fan after they shit out movies since 2000.