Noah Webster's Dictionary (adv.) In a stout manner; lustily; boldly; obstinately; as, he stoutly defended himself.

Multi-Version Concordance Stoutly (1 Occurrence) Luke 22:59 After an interval of about an hour some one else stoutly maintained: "Certainly this fellow also was with him, for in fact he is a Galilaean." (WEY DBY)