Information on "Dunn"

This appears to be your Alexander's marriage record.  You can see the original at irishgenealogy.ie.

Marriage: 02-Apr-1863
Parish of OMAGH County: TYRONE

Name: Alexander Dunn, farmer Ann Clements
Address: Pomeroy P. Of Altdesert Rathmacken P. Termonmaguirk

Age: 24 20
Status: Bachelor (Previously unmarried) Spinster (Previously unmarried)
Husband's Father Wife's Father
Name: Thomas Dunn Robert Clements
Both farmers
Witnesses: James Clements Robert Patrick

"Unknown Dunn (female)" was born 16-Mar-1868 to Alexander Dunn, a farmer, and Ann Clements. Address: Killea in parish of Pomeroy, Co. Tyrone. You can see the original at irishgenealogy.ie.

Awesome! Thank you kindly!
(I rewrote my post and reposted it!.)