I worked with Sytse (as Sid used to be called) back in 2011/2012 in The Hague when he consulted at Digidentity, with Marin. Great guy back then, used to run around in a lab coat, the GitLAB guy. Wonderful to see what Gitlab has become, well done!
That explains a lot. I thought Sid was an unusual name for someone with that surname. But it makes business sense to use something more internationally pronounceable.