Synonyms of so-and-so

1 Syllable
far, dark, new, x
2 Syllables
hidden, unknown, far-off, whoever, secret, humble, incog, strange, foreign, untold, distant, unsung
3 Syllables
concealed, unnamed, such-and-such, remote, nameless, faraway, uncharted, alien, exotic, unheard-of, unnoted
4 Syllables
unrenowned, somebodies, unfamiliar, anonymous, unexplained, unexplored, desolate, unperceived, unrevealed, somebody, incognito
5 Syllables
undiscovered, undistinguished, unrecognized, unapprehended, unascertained, unidentified, uncelebrated