妙法蓮華經玄贊 2.231

2.231

“Sugata” means possessing all varieties of the two merits of self-benefit and benefiting others throughout the long night. “Gata” means gone. That is, having attained bodhi, he has well gone throughout the long night of saṃsāra, equipped with all varieties of the good deeds of the two benefits. Therefore he is named Sugata.