I hear you on that! It is some "unconscious bias", though that may be too strong; I think it has more to do with simple unfamiliarity. (I wanted to use the word "ignorance", but that has a negative connotation instead of a neutral one.) Programmers tend to accommodate that with which they are familiar; if they have never had a friend with two-word names, it is not bias to think no one does. This is seen anytime web forms allow use in Canada, but the postal code only accepts five numbers. Names are especially challenging because the British/American of "First Middle Last" is not a global norm. My Spanish and Portuguese co-workers have so many different names it is hard to keep track of them!
My last name is "Mac Leod" with a space, though lots of MacLeods and McLeods go without he space; it's purely preference. That space has now caused two decades of chaos as many online forms—especially in the early days when first setting up accounts and logins—do not allow spaces. And of course spaces never work in email addresses, leading recipients to be unaware that when written, it has a space. If I knew then what I know now, I would have abandoned the space before getting my first driver's license!
While "Mac Leod" is historically Scottish, my ancestors came to Canada and USA more than 250 years ago. I cherish my heritage, but do not consider myself foreign.
