Ἀχελῳίς

From LSJ

τίς δ' οἶδεν εἰ τὸ ζῆν μέν ἐστι κατθανεῖν, τὸ κατθανεῖν δὲ ζῆν κάτω νομίζεται → who knows if life is death, and if in the underworld death is considered life

Source

Spanish (DGE)

ἡ ét. del Aqueloo, aqueloide St.Byz.s.u. Ἀχελῷος.