Depending of the kanji it could mean many things. The most common one I found was 'Island Shellfish'
Don Sugai Matsuda's birth name is Donald Sugai.
Hitoshi Sugai was born in 1962.
Takekichi Sugai was born in 1871.
Takekichi Sugai died in 1944.
Katsutoshi Sugai was born in 1971, in Japan.
Naoki Sugai was born on 1984-09-21.
Noboru Sugai was born on 1949-10-16.
Kin Sugai's birth name is Kimiko Susai.
Kin Sugai was born on February 28, 1926, in Tokyo, Japan.
Jun'ichi Sugai has written: 'Atarashii kagaku no hanashi' -- subject(s): Science, Technology
Don Sugai Matsuda was born on September 6, 1913, in Portland, Oregon, USA.
The cast of Sugai kun to kazoku ishi - 2008 includes: Frogman