Comes from the Latin word clarus meaning - "clear, bright, gleaming; illustrious; famous".
Clare was a beautiful Italian noblewoman who became the Foundress of an order of nuns now called "Poor Clares." When she heard St. Francis of Assisi preach, her heart burned with a great desire to imitate Francis and to live a poor humble life for Jesus. So one evening, she ran away from home, and in a little chapel outside Assisi, gave herself to God. St. Francis cut off her hair and gave her a rough brown habit to wear, tied with a plain cord around her waist. Her parents tried in every way to make her return home, but Clare would not.
Her feast day is August 11.