my nana's name was iris and i love it, it brings back lovely memories of my childhood. i would've used it too but it doesn't go with our last name. it might sound a little old fashioned but then so are ava, lily, evie and these names are all popular again and no-one talks about them sounding like granny names.
And as for sounding like virus, i think you could come up with lots of words that sound like most peoples names....