Skip to main content

Aco, Michel

Michel Aco (both: mēshĕl´ äkō´), fl. 1680–1702, French explorer. He became La Salle's lieutenant, being favored by that explorer because of his courage, prudence, and wide acquaintance with Native American languages. When La Salle reached the mouth of the Illinois River on his famous voyage down the Mississippi, he sent Aco with two companions to explore the upper reaches of the Mississippi. One of the companions was Father Louis Hennepin, who in his Nouvelle Decouverte made himself the hero of the expedition. Near the Falls of St. Anthony, which they were the first Europeans to see, the three were captured by members of the Sioux tribe and were released only through the energy and influence of Daniel Greysolon Duluth. Little is known of Aco's subsequent life except that he was a trader on the Illinois for many years and that in 1693 he married the daughter of a Kaskaskia chief. His name also appears as Ako.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Aco, Michel." The Columbia Encyclopedia, 6th ed.. . 15 Jan. 2019 <>.

"Aco, Michel." The Columbia Encyclopedia, 6th ed.. . (January 15, 2019).

"Aco, Michel." The Columbia Encyclopedia, 6th ed.. . Retrieved January 15, 2019 from

Learn more about citation styles

Citation styles gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).

Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, cannot guarantee each citation it generates. Therefore, it’s best to use citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

The Chicago Manual of Style

American Psychological Association

  • Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.