Given how rare the surname Prideaux is in the context of Ireland, note the following.
A John and Elizabeth Prideaux arrived at Londonderry in December 1928 on board the 'Transylvania' from New York, John was recorded as a 57 year old gardener, Elizabeth as a 57 year old housewife, the address they were heading to was 'Lisnoroe Clones, Co. Monaghan, Ireland'.
The closest I could find for that location are the townlands of Lisnaroe Far & Near, which are near Clonmackan:
https://www.townlands.ie/monaghan/dartree/clones/clones-rural/lisnaroe-far/https://www.townlands.ie/monaghan/dartree/clones/clones-rural/lisnaroe-near/https://www.townlands.ie/fermanagh/clankelly/clonkeelan/clonmackan/What looks like the same couple sailed to Boston on the 'Lancastria' leaving Liverpool in February 1929, both aged 58, John recorded as naturalised at Lynn, Massachusetts on 9.3.1905, Elizabeth naturalised by marriage, their address in the USA given as Swampscott, Massachusetts.
I can see a marriage (available to view on the 'familysearch' website) registered in the city of Boston for a John R Prideaux and Elizabeth F Rafferty, it took place on 4 August 1901, their address given as 17 W Cottage Street, John was recorded as a 30 year old gardener, born in England to Samuel Prideaux and Jenet West, Elizabeth was recorded as a 29 year old domestic servant, born in England to John Rafferty and Elizabeth Dodge (though in the 1930 US census, Elizabeth's birth place, and those of her parents, were stated as Northern Ireland).
Note the following grave for a John Robert Prideaux who died in 1933 aged 61-62 and was buried at Lynn, Massachusetts:
https://www.findagrave.com/memorial/185816122/john-robert-prideaux
