Romans 16:6

Mary Mariam or Maria. Both forms represent the Heb. Miriam. In the Gospels, the Holy Mother is always, or nearly always, called Mariamin the Greek text; the other Maries, Maria. This is the only Hebrew name in this chapter.

bestowed much labour Lit. toiled; the strongest word for pains and efforts.

on us The better reading is, on you. We do not know the occasion or occasions of these "labours." The verb is aorist, and refers to a definite past period or crisis.