According to Harry Moscow, The Street Book, Fordham U. Pr., 1978, Nicholas Bayard III, a landowner -- an ancestor gave his name to Bayard street -- named Houston street, which he had opened on property he owned, after William Houstoun of Georgia, his son-in-law, in the late 18th century.
An NYU English professor, a man likely to know, told me once that the difference in pronunciation between Houston street and Houston, Texas, was owing to the difference between the English and the Scottish pronunciations of the name. The
Georgia boy was of Scottish ancestry.
George A. Thompson
Author of A Documentary History of "The African Theatre", Northwestern Univ. Pr., 1998.