Akiyama literally means "Autumn Mountain". Aki being Autumn with Yama meaning mountain or hill.
Runa Akiyama's birth name is Teruko Akiyama.
I think you will find that it's Akiyama, which means 'autumn mountain'. 秋山 (akiyama) is a common surname in Japan.
Japanese?
Makio Akiyama was born in 1950.
Akiyama Nobutomo was born in 1531.
Mizuhito Akiyama was born in 1971.
Ryōji Akiyama was born in 1942.
Yūtokutaishi Akiyama was born in 1935.
Shōtarō Akiyama died in 2003.
Shōtarō Akiyama was born in 1920.
Yoshihiro Akiyama was born in 1975.
Tetuzi Akiyama was born in 1964.