Looking at the 1870 census we see the following names that were around Gortnaskehy, Fiddane, and Glencroe. These are the names of the heads of households in Allamakee that were born in Ireland. These are the surnames that appear on baptismal certificates of the James and Ann (Campbell) Ryan children:

CAMPBELL ALEXANDER 63 M W IREL IA ALLAMAKEE  LINTON TWP         1870
CAMPBELL ANDREW         56 M W IREL IA ALLAMAKEE  PAINT CRK TWP        1870
CAMPBELL BARETTI         52 M W IREL IA ALLAMAKEE  UNION PRAIRIE TWP 1870
CAMPBELL W J         42 M W IREL IA ALLAMAKEE  POST TWP             1870
CAREY         CORNELIUS 51 M W IREL IA ALLAMAKEE  MAKEE TWP            1870
CAREY         CORNELIUS 35 M W IREL IA ALLAMAKEE  MAKEE TWP     1870
CAREY         PAT         58 M W IREL IA ALLAMAKEE  UNION CITY TWP  1870
CUMMINS PAT         49 M W IREL IA ALLAMAKEE  FRANKLIN TWP         1870
RUSSELL PETER         75 M W IREL IA ALLAMAKEE  HANOVER TWP          1870
RUSSELL TIMOTHY         58 M W IREL IA ALLAMAKEE  LAFAYETTE TWP 1870

Separately, these are the Hill entries:

HILL EDWARD                 50 M W IREL IA ALLAMAKEE TAYLOR TWP            1870

Then for the McDonald entries:

MCDONALD        JAMES         56 M W IREL IA ALLAMAKEE PAINT CRK TWP 1870
MCDONALD PATRICK         34 M W IREL IA ALLAMAKEE FAIRVIEW TWP         1870


Finally, the Ryan entries.  Most of these are from Hollyford, and some we are unaware of their origin.  A few we know are related through marriage such as Patrick Ryan and Richard Ryan (Boneys):

RYAN EDWARD                 33 M W IREL IA ALLAMAKEE UNION PRAIRIE TWP 1870
RYAN JAMES                 62 M W IREL IA ALLAMAKEE UNION PRAIRIE TWP 1870
RYAN JEREMIAH         35 M W IREL IA ALLAMAKEE TAYLOR TWP     1870
RYAN JEREMIAH         40 M W IREL IA ALLAMAKEE UNION PRAIRIE TWP 1870
RYAN JOHN                 60 M W IREL IA ALLAMAKEE FRENCH CRK TWP 1870
RYAN MARY                 75 F W IREL IA ALLAMAKEE UNION CITY TWP 1870
RYAN MICHAEL                 53 M W IREL IA ALLAMAKEE FAIRVIEW TWP         1870
RYAN MICHAEL                 42 M W IREL IA ALLAMAKEE TAYLOR TWP      1870
RYAN PAT                 35 M W IREL IA ALLAMAKEE UNION CITY TWP 1870
RYAN PATRICK                 50 M W IREL IA ALLAMAKEE FAIRVIEW TWP         1870
RYAN PATRICK                 38 M W IREL IA ALLAMAKEE TAYLOR TWP     1870
RYAN PATRICK           34 M W IREL IA ALLAMAKEE UNION PRAIRIE TWP 1870
RYAN RICHARD                 50 M W IREL IA ALLAMAKEE UNION PRAIRIE TWP 1870
RYAN THOMAS                 60 M W IREL IA ALLAMAKEE LAFAYETTE TWP 1870
RYAN THOMAS                 45 M W IREL IA ALLAMAKEE UNION CITY TWP 1870
RYAN WILLIAM                 65 M W IREL IA ALLAMAKEE TAYLOR TWP            1870