In some hymnals, the editors noted that a hymn's author is unknown to them, and so this artificial "person" entry is used to reflect that fact. Obviously, the hymns attributed to "Author Unknown" "Unknown" or "Anonymous" could have been written by many people over a span of many centuries. Go to person page >
[Holiness Desired.] This hymn was given anonymously in Dr. C. A. Bartol’s Hymns for the Sanctuary, commonly known as the West Boston Unitarian Collection, 1849, No. 290, in 5 stanzas of 4 lines. This was repeated in the Sabbath Hymn Book, 1858; the Laudes Domini, 1884, and other American hymnbooks. Another form of the text is "Take my heart, O Father, mould it," in 3 stanzas. It appeared in the Unitarian Hymns of the Spirit, Boston, 1861. This is altered from the former. [Rev. F. M. Bird, M.A.]--John Julian, Dictionary of Hymnology (1907)
This hymn, doubtless of New England Unitarian origin, is in C. A. Bartol's Hymns for the Sanctuary, 1849, and is Anon., also in Hymns of the Spirit, 1864, where it begins, "Take my heart, 0 Father! mould it." -- Samuel Duffield, English Hymns: Their Authors and History (1886)
Sometimes attributed to Charles Wesley, but not found in any of his published works or manuscripts (Website of The Center for Studies in the Wesleyan Tradition, Duke Divinity School).