...in the US. Mexico didn't get iPods that year. Mexico didn't even get the first version of the iPhone when it came out. You had to buy it in the US and unlock it. I think the first iPhone legally available in Mexico was the 3G.
The Linksys iPhone came out in 1998 too (https://en.wikipedia.org/wiki/Cisco_iphone). I doubt they were copying the iMac naming, which was just released around the same time. Putting 'i' in front of your product names, when the Internet starts to become a commodity and you want to connect your product to it, isn't exactly far-fetched.
Thanks, that is a silver bullet counterexample I was unaware of. I guess there's a decent amount of doubt we can merit whether it was connected.
I guess the "i" branding is a natural extension of "e" branding that followed from email. Anyway like I said I dont think Apple should have exclusive rights to "i" branding for various reasons, the biggest of which is that it doesn't seem like they've attempted to defend it against hundreds of other products using it.