What was the name of the newspaper that william lloyd garrison published in order to spread his anti-slavery ideas?

The name of the newspaper is The Liberator.

Explanation:

The Liberator was founded by American Journalist crusader William Lloyd Garrison on the 1st of January 1831 at the United States of America.

Unlike most newspapers, The Liberator was a weekly abolitionist newspaper with a religious tone that appealed to the conscience of readers, urging them to without hesitation, demand for the freedom of slaves.

Asides spreading anti-slavery ideas, The Liberator was also an advocate of women rights until its last issue in 1865.