John Ogilvie, who was born in 1579, was part of the Scottish aristocracy. Brought up as a Calvinist, he received his education in Europe. Confronted with the religious disputes of his era and inspired by the devotion of the martyrs, he chose to convert to Catholicism.

In 1596, at the age of seventeen, he was welcomed into the Church at Louvain. John later attended several Catholic schools before applying to the Jesuits. He was ordained in Paris in 1610 and requested to be sent to Scotland, hoping that some Catholic nobles there would support him due to his heritage. Seeing none, he travelled to London, then returned to Paris, and eventually went back to Scotland. John's efforts were very effective in bringing numerous individuals back to the Faith.

After a while, he was deceived by someone pretending to be a Catholic. Following his arrest, he endured torture in prison to force him to disclose the names of other Catholics, but he did not comply. Following three trials, John was found guilty of high treason for converting Protestants to the Catholic Faith and rejecting the king's spiritual authority by promoting the Pope's spiritual supremacy and denouncing the oaths of supremacy and allegiance. Condemned to death, the brave priest was executed by hanging in Glasgow in 1615 when he was thirty-six years old.

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