何なにがし

noun, noun which may take the genitive case particle 'no'

some; a certain amount

Only with reading なにがし

Used to indicate an unspecified but definite amount, often in the pattern なにがしか. Formal or literary.

• 彼かれはなにがしかの金かねを寄き付ふした。

  He donated a certain amount of money.

pronoun

a certain person; Mr. So-and-so

Refers to an unspecified person whose identity is known but not revealed. Formal or written style.

• 何なにがしという人じん物ぶつが訪たずねてきた。

  A certain person came to visit.

pronoun

I; me

Only with reading なにがし

Archaic humble first-person pronoun. Used in historical or highly formal contexts to refer to oneself modestly.

• 何なにがしが承うけたまわりました。

  I have received your message (archaic humble).