This is a list of surnames in which the meaning contains the keyword flat.
Hirano JapaneseFrom Japanese
平 (hira) meaning "level, even, peaceful" and
野 (no) meaning "field, wilderness".
Hirata JapaneseFrom Japanese
平 (hira) meaning "level, even, peaceful" and
田 (ta) meaning "field, rice paddy".
Necchi ItalianPossibly from Italian
neccio, a type of flat bread.
Platt EnglishFrom Old French
plat meaning
"flat, thin", from Late Latin
plattus, from Greek
πλατύς (platys) meaning "wide, broad, flat". This may have been a nickname or a topographic name for someone who lived near a flat feature.