Found obituaries for John Henry Tierney and Anna (Marron) Tierney. I sent them to the the Mower Co. coordinator to post, they should be posted in the next day or so if not sooner for you to see.
They are buried here in Austin, Calvary Cemetery. In John's obituary it says St. Augustine's Cemetery. name was changed to Calvary Cemetery in 1950.
Robert Tierney their son is also buried there b.1876 d. 1913. found a small write up in the Mower County Transcript, March 03, 1913 page-3, col.-3
The body of Robt. Tierney aged 38 years was brought here from Bemidji Saturday for interment. He died Thursday.
In the Mower County Transcript, Wed. 5-09-1883, page-3, col.-3
Marriage licenses were issued by Clerk of Count Sweningsen for the month of April.
William S. Tierney and Mary Kilroy.
Checked my Mower County history books for any Tierney's found a Emma Tierney who married a David L. Smith in 1851. Came to Minnesota in 1854 settled in the present site of Austin.