Well my original nickname (different from my actual first name) was “cikarin3” - reference to the čikarí squirrel and my favorite number, back than I joined the community around Dishonored Wolf, so I started using a pixelated wolf as my avatar, that later evolved into the current shiba-looking inugami mascot and was using all kinds of canine related nicknames, or just the word canine/dog in different languages, so it eventually just stuck to me and I became “The Canine”.
There are also other two not that used canine related nicknames CAW (short for “Canines Always Win”) and YOTC (short for “Year Of The Canine” and a reference to the other fancy sunglasses emotes, that are usually called “Year Of The…thing”) and as I said many other canine related jokes. 🙃