Illinois:  History of Cass County, Illinois, ed. William Henry
Perrin. O. L. Baskin & Co. Historical Publishers, Chicago, 1882. 
Cass County.

WILLIAM DOWDALL, a thrifty farmer of Cass County, Virginia
precinct, came to Cass County in 1851, via New Orleans, having
landed there direct from Ireland, where he was born, Sept. 10,
1830; his native home was within sixteen miles of the renowned
city of Belfast, the pride of the Emerald Isle.  His father, Hugh
Dowdall, was a farmer, brought up his sons as farmers, and our
subject shows, in his methods of directing his farm, the
thoroughness that characterized his father's labors.  Mr. Dowdall
located on his present place of 176 acres, soon after his arrival
in Cass County, and in Dec. 18, 1852, was married to Miss Jane
Havern, also a native of Ireland, who came to America on the same
ship with Mr. Dowdall.  They have four children:  Hugh H.,
William J., Samuel W., and Mary Jane.  Mr. and Mrs. Dowdall are
members of the Presbyterian Church of Virginia, and he belongs to
the Republican party.

Dowdall Havern
=
Ireland