Nargis also appears in the author’s list; its initial nūn resembles an imperfect-verb prefix.
مَرَرْتُ بِنَرْجِسَ. — I passed by a person named Nargis.
Used as a proper name here, نَرْجِسَ has genitive fatḥa. When the same word denotes a kind of flower, it is a common noun and the author’s particular proper-name-plus-pattern reasoning does not apply in the same way.