(archaic) second-person singular past form of to crown.
1611, King James Version of the Bible (Authorized Version)Hebrews 2:7 Thou madest him a little lower than the angels; thou crownedst him with glory and honour, and didst set him over the works of thy hands.
From crowned + -est, the archaic second-person singular present tense suffix.
English Wiktionary. Available under CC-BY-SA license.