[5] He was also rumored to have been appointed the United States Ambassador to Great Britain under President Cleveland.

[7][8] In 1919, he sold his house at 15 East 65th Street in Manhattan, to Rufus L. Patterson Jr., due to his opposition to Prohibition.

[9] He then lived abroad, spending most of his time at a villa in Cannes, France,[10] from February 1920 until his death.

[26] His will provided trust funds of $500,000 (equivalent to $8,941,000 in 2023) each for his daughters, Mary and Sarah, the principal to go to their descendants.

[26] Van Alen was one of several very rich men who rented, but did not buy, Rushton Hall in Northamptonshire, England, from the Clarke-Thornhill family.

[28] Van Alen's father had a home in Newport, Rhode Island, called "The Grange" and lived there year-round.

[29] In 1887, seven years after his wife's death in 1881, Van Alen's father gave him the land and he commissioned American architect Dudley Newton to build a replica of Wakehurst Place in Newport from plans designed by Charles Eamer Kempe.

In 1936, after Alexei's death, she married Prince Sergei Mdivani (1903–1936), her first husband's older brother.