Judith St. George had 4 siblings.
St. Clare's siblings were named Agnes and Beatrix.
It is not specifically mentioned in historical records whether St. Matthew the Apostle had siblings. The Bible does not provide any information about his family or siblings.
There aren't any official names for Kiara's cubs. The answer to your question is left to fanfiction.
St. Teresa of Avila had 9 siblings.
Historians are uncertain about whether St. Paul had any siblings as there is no specific mention of them in historical records or the Bible. St. Paul himself does not mention any siblings in his letters.
Yes, St. Nicholas is believed to have had siblings. His most well-known sibling is his brother, who later became the bishop of Myra after St. Nicholas.
Yes, St. John Neumann had five siblings: three brothers and two sisters.
There are a number of saints who were siblings. Here are a few: St. Scholastica and St. Benedict St. Gervase and Protase St. Cosmas and Damian St. Begga and St. Gertrude
Francis had six siblings but there names are not recorded.
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St. Bernardine of Siena was an only child.