Nori was used as a girl's name back in the olden days. Based on some research that I've done (gathering names from passenger lists and US census data), Nori was a very uncommon name to have in the late Edo period and the Meiji & Taishō periods.2 syllable names were preferred at the time, more so before the Meiji period, which is why Nori was seen as a girl's name. Towards the 2nd half of the Meiji period and the Taishō period, those types of names were quickly shunted out in popularity by names ending in *ko.
I've never met anyone named just "Nori". There always seems to be something else attached. Noriko Norie Norimi Norihiro Masanori Norihide Hidenori (many)
(Information from name #407255 originally submitted by user micejerry)