Kalna Family

I have been looking for information on my Great Grandmothers siblings and I am thinking I have at least found their names and birthdates, or at least within a couple days of the actual date.

My Great Grandmother is Maria Kalna, who married John Kozar.She was born February 28, 1881 and passed away August 11, 1941.They settled in Youngstown, OH.

Siblings:
Joannes (John) Kalna, born July 13, 1873
Joannes (John) Kalna, born Octoer 23, 1883
Stephanus Kalna, born July 25, 1886
Maria Kalna, born July 24, 1877
Catherine Kalna, born November 26, 1876, death December 30, 1963, married George Hannis in 1895.

They were born in Vydrník, Poprad, Slovakia.I found the baptismal records on Family Search.

Their parents are Joannes & Maria (Szlavkovsky) Kalna.

I have a decent amount of information on my Great Grandmother Maria (b. 1881) and her sister Catherine Hannis, but am looking for more information on the other siblings and even the parents if that is even possible.