This is a list of surnames in which the usage is Japanese; and the first letter is M; and the gender is unisex; and the length is 4.
Maki 2 真木, まき JapaneseFrom Japanese
真 (ma) meaning "real, genuine" and
木 (ki) meaning "tree".
Moto 本, もと JapaneseFrom Japanese
本 (moto) meaning
"base, root, origin". More commonly it is the final character in Japanese surnames.
Mutō 武藤, むとう JapaneseFrom Japanese
武 (mu) meaning "military, martial" and
藤 (tō) meaning "wisteria". The final character may indicate a connection to the Fujiwara clan.