As a unisex name, it can be used as 理希, 里希, 利希, 莉樹, 里生 or 莉希 with 理 (ri, kotowari) meaning "arrangement, justice, logic, reason, truth", 里 (ri, sato) meaning "league, parent's home, ri (unit of distance - equal to 3.927 km), village", 利 (ri, ki.ku) meaning "advantage, benefit, profit", 莉 (rai, ri, rei) meaning "jasmine", 希 (ki, ke, mare) meaning "beg, beseech, few, Greece, hope, phenomenal, pray, rare, request", 樹 (ju, ki) meaning "timber trees, wood" and 生 (shou, sei, i.kiru, u.mare, o.u, ki) meaning "birth, genuine, life."
As a masculine name it can be used as 力樹, 力輝, 理基, 理樹, 理紀, 理貴, 理輝, 里樹, 利紀, 吏希 or 里輝 with 力 (rii, riki, ryoku, chikara) meaning "bear up, exert, power, strain, strength, strong", 吏 (ri) meaning "an official, officer", 輝 (ki, kagaya.ku) meaning "gleam, radiance, shine, sparkle, twinkle", 基 (ki, moto, motoi) meaning "foundation, fundamentals", 紀 (ki) meaning "account, chronicle, geologic period, history, narrative" and 貴 (ki, tatto.i, touto.i) meaning "esteem, honour, precious, prize, value."