Wikipedia Biographical Summary

"...Karl Gottfried Maeser (January 16, 1828 – February 15, 1901) was a prominent Utah educator and a member of The Church of Jesus Christ of Latter-day Saints (LDS Church). He is most famous for having served 16 years as principal of Brigham Young Academy, now Brigham Young University (BYU), where he is seen as the true founder of the institution.

A Native of Saxony, Maeser served as a missionary for the church in four nations and held many leadership positions in the church, including serving as the head of the Church Educational System and in the central leadership of the Sunday school.."

"...Maeser was married twice, first to Anna Mieth in 1854, and then in 1875 to Emilie Damke as a plural wife. Karl had a total of 11 children, several of which died in infancy...."

SOURCE: http://en.wikipedia.org/wiki/Karl_G._Maeser

His third great-grandson is Roy Halladay