He/she came right up to me! I was having lunch by the river and the little fella just ran up to me and started singing. They eat bugs and don't really scavenge off people so I don't think he was even after my food. He even hopped on my foot briefly!
I'd assumed you were just using it's standard nickname (e.g. Jenny Wren or Robin Redbreast).
I wonder whether it is named from it's cousin's English nickname. As an example of that, Robins were once just "Redbreasts", got nicknamed Robin, and somehow, the nickname became the standard way to name them. As you can perhaps tell, this derivation amuses me