Martyrdom in Judaism is one of the main examples of Kiddush Hashem

Kiddush Hashem

The sanctification of the Name The sanctification of the Name The sanctification of the Name (in Hebrew kiddush Hashem is a precept of Judaism. It includes sanctification of the name by being holy.-Hebrew Bible:...

, meaning "sanctification of God's name" through public dedication to Jewish practice.

Book of Maccabees

1 Maccabees

1 Maccabees

The First book of Maccabees is a book written in Hebrew by a Jewish author after the restoration of an independent Jewish kingdom, about the latter part of the 2nd century BC. The original Hebrew is lost and the most important surviving version is the Greek translation contained in the Septuagint...

 and 2 Maccabees

2 Maccabees

2 Maccabees is a deuterocanonical book of the Bible, which focuses on the Jews' revolt against Antiochus IV Epiphanes and concludes with the defeat of the Syrian general Nicanor in 161 BC by Judas Maccabeus, the hero of the work....

 recount numerous martyrdoms suffered by Jews

Jews

The Jews , also known as the Jewish people, are a nation and ethnoreligious group originating in the Israelites or Hebrews of the Ancient Near East. The Jewish ethnicity, nationality, and religion are strongly interrelated, as Judaism is the traditional faith of the Jewish nation...

 resisting the Hellenizing of their Seleucid overlords, being executed for such crimes as observing the Sabbath, circumcising their children or refusing to eat pork or meat sacrificed to foreign gods.

Pharisaic tradition

First and Second Maccabees arose from the Pharisaic tradition, from which Christianity later diverged.
The accounts of martyrs in these books influenced early Christianity's understanding of the laws of their fathers and their God:

And to defile the temple that was in Jerusalem, and to call it the temple of Jupiter Olympius: and that in Gazarim of Jupiter Hospitalis, according as they were that inhabited the place.

And very bad was this invasion of evils and grievous to all.

For the temple was full of the riot and revellings of the Gentiles: and of men lying with lewd women. And women thrust themselves of their accord into the holy places, and brought in things that were not lawful.

The altar also was filled with unlawful things, which were forbidden by the laws.

And neither were the sabbaths kept, nor the solemn days of the fathers observed, neither did any man plainly profess himself to be a Jew.

But they were led by bitter constraint on the king's birthday to the sacrifices: and when the feast of Bacchus was kept, they were compelled to go about crowned with ivy in honour of Bacchus.

And there went out a decree into the neighbouring cities of the Gentiles, by the suggestion of the Ptolemeans, that they also should act in like manner against the Jews, to oblige them to sacrifice:

And whosoever would not conform themselves to the ways of the Gentiles, should be put to death: then was misery to be seen.

For two women were accused to have circumcised their children: whom, when they had openly led about through the city with the infants hanging at their breasts, they threw down headlong from the walls.

And others that had met together in caves that were near, and were keeping the sabbath day privately, being discovered by Philip, were burnt with fire, because they made a conscience to help themselves with their hands, by reason of the religious observance of the day.

Crusades

A historical Ephraim ben Yaakov (1132 - AD. 1200) describes Crusaders'

Crusades

The Crusades were a series of religious wars, blessed by the Pope and the Catholic Church with the main goal of restoring Christian access to the holy places in and near Jerusalem...

 massacres of Jews, including the massacre at Blois

Blois

Blois is the capital of Loir-et-Cher department in central France, situated on the banks of the lower river Loire between Orléans and Tours.-History:...

, where approximately forty Jews were killed following an accusation of ritual murder

Blood libel

Blood libel is a false accusation or claim that religious minorities, usually Jews, murder children to use their blood in certain aspects of their religious rituals and holidays...

:

"As they were led forth, they were told, 'You can save your lives if you will leave your religion and accept ours.' The Jews refused. They were beaten and tortured to make them accept the Christian religion, but still they refused. Rather, they encouraged each other to remain steadfast and die for the sanctification of God's Name."

Spanish Inquisition

During the Spanish Inquisition, many of those executed were Jews who refused to convert to Christianity.
Specifically, they were cryptic Jews, who had pretended to adopt Christianity in an attempt to avoid persecution.