Usage examples for justly:

• " But," he continued, and very justly stop it at Constantinople, or at Tripoli, and then it will be stopped here." "Travels in the Great Desert of Sahara, in the Years of 1845 and 1846" – James Richardson

• " You had better go with him before my uncle," said I. " He will deal justly with thee. "In the Days of Drake" – J. S. Fletcher

• You cannot say no, Sir John; for should his majesty hear that you have refused to come to a meeting at which he is to be present, it would seriously, and, I might add, justly offend him, nor could I answer for the consequences. "The Monikins" – J. Fenimore Cooper

• This was a great step toward real independence and made the king justly popular. "The Story of Norway" – Hjalmar H. Boyesen