Rightfully, legitimately. Obsolete.

In accordance with legal entitlement or established rights; legitimately, by right.

Originally and chiefly Scottish. In accordance with legal entitlement; lawfully, legitimately; by right. Cf. rightfully, adv. 3. Obsolete.

Scottish. Rightly; rightfully, by right. Obsolete.

By proper or legal means; legitimately; in accordance with rules or laws. Cf. foully, adv. 2a.

of right, by right, according to law. Nearly always opposed to de facto; like that also (though less usually), treated as an adj. = ‘legal’, and…