I searched online for Tridion and Umbraco and came up empty. If anyone has any idea what the name means or the history behind it, please let me know via a comment.
As for Squiz, there is no official version. But I did find out that the word "Squiz" is Aussie slang for an inquisitive look. Maybe that's what it means and maybe I'm correct...
— n , pl squizzes
slang ( Austral ), ( NZ ) a look or glance, esp an inquisitive one
[C20: perhaps a blend of squint and quiz ]
1. Dictionary.com, "squiz," in Collins English Dictionary - Complete & Unabridged 10th Edition. Source location: HarperCollins Publishers. http://dictionary.reference.com/browse/squiz. Available: http://dictionary.reference.com. Accessed: September 25, 2012.