Where did you find/learn the term "second syllable name" and "first syllable name"? I tried looking it up and struck out (aside from some requests for baby names like that), though it's quite descriptive and makes perfect sense.
It did lead me to the wikipedia article [0] about African-American names, which enlightened me a bit on the origins of some of those.
But that's the thing: your mind is capable of making these subconscious connections. So if you happen to be discriminatory against African Americans, names are going to be a signal whether you realize it or not.
I'm oddly reminded of some TikToks I've seen recently where people talk about how they're unintentionally conditioned their dogs with things like "Thank you, good meeting" as something they always say at the end of a Zoom call and their dogs perk up because they know they're going to get attention, go for a walk or whatever.
Forming a connection doesn't require intent from either party.
I'm very aware of the biases that I gained growing up in my household and do my absolute best to crush them. That's why this term stuck out to me; it's not something I had heard but makes absolute sense when I look at how people in my family react to names.