This is James Waddell Alexander (March 13, 1804 – July 31, 1859). He was the son of the Reverend Archibald Alexander of Princeton fame and Janetta Waddell Alexander.  Like his father, he attended Princeton and became a Presbyterian minister. 

Alexander was pastor in Charlotte County, Virginia; at the First Presbyterian Church in Trenton, New Jersey; and at the Duane Street Presbyterian Church in New York City, which became the Fifth Avenue Presbyterian Church.  He served at the latter until his death, which, tragically, occurred at the age of 55.  He had returned to Virginia because of poor health and died there of dysentery.

He married Elizabeth Clarentine Cabell and they had seven children.

He was my second cousin four times removed.