re: The will of Thomas WHITNEY, Newpass alias Derrydown (Derrydooan), co. Westmeath Ireland, 30 April 1740
mentioned his brother BOLEYN WHITNEY,
his sister Ann Upton & her husband Ambrose Upton,
his brother Shuckburgh Whitney.
Thomas WHITNEY's lands, etc., were "castles, towns and lands of Newpass, Rathowen, COLEMORE, COLEBEGG, Win(d)town, Ballygarron, Ballydorey" and others in Co. Westmeath.

Boleyn WHITNEY was nephew of Mrs. Robert Adair of co. Longford, houses in Dublin City, and of "Hollybrook" co. Wicklow, mentioned in Mrs. Adair's will of 1747.

See townland guide c.1850 attached to the previous message
(click on the guide to enlarge it).

Rathowen was to the east of Derrydooan Upper.

The tune "Johnny Adair of Derrydown"
may have been of John Adair of Derrydooan ?
.........................
The "National Inventory of Architectural Heritage"
Home>Surveys>Gardens website have more maps of the townlands for :
Newpass,
Rathowen (Glebe House, Rathaspick)
Rockfield (or Crumlin)
Joanstown (Ardglass House & Fairy Hall)

at http://www.
buildingsofireland.ie/cgi-bin/frontpage.cgi