Yeah. Sure. But...no, since "guard" derives from the same Germanic root as "garten" (thus, the Germanic word "kindergarten" - to watch over the children), which itself derives from the Indo-European root "girt-". Whereas "yard", derives via the Germanic language from the Indo-European root "gher-"
Which, incidentally, is where the British confusion over the "h" and "silent g" in words like "scatging" come from. It's a bone of contention in the linguistic profession whether the Indo-European root "gher-" is pronounced "her-" or "ger-". Or even something like "zher-" or "jer-". So the British confusion is understandable.
Or, in other words...don't try to out-bull sh-- a bull sh-- artist.