Ambrose, William a Welsh Congregational minister, was born at Bangor in 1813. He received a liberal education partly in his own city and partly at Holyhead. His only charge was at Portmadock, where he was ordained in 1837, and where he continued to labor till his death, Oct. 31, 1873. Mr. Ambrose was tall, gentlemanly, and commanding in appearance. As a preacher, he was polished, simple, persuasive, and very practical; as a poet, he took a high rank; as a speaker, he was chaste and masterly in diction, pointed in argument, abounding in scathing sarcasm, and very convincing in effect. He was a Christian of untarnished reputation and character. He was probably the most accomplished, heart-searching, and effective preacher that Wales ever produced. Mr. Ambrose was associate editor of the Dysgedydd, the leading Congregational periodical of North Wales. See (Lond.) Cong. Year-book, 1874, p. 308.