Isamar Rosenbaum was a Hasidic rebbe

Rebbe

Rebbe , which means master, teacher, or mentor, is a Yiddish word derived from the Hebrew word Rabbi. It often refers to the leader of a Hasidic Jewish movement...

, and the progenitor of the extended Hasidic dynasty

Hasidic dynasty

A Hasidic dynasty is a dynasty of Hasidic spiritual leaders known as rebbes, and usually has some or all of the following characteristics:#Each member of the dynasty is a spiritual leader, often known as an ADMOR or simply as Rebbe and at times called the...

 of Nadvorna

Nadvorna (Hasidic dynasty)

Nadvorna is a Hasidic rabbinical dynasty within Orthodox Judaism. The dynasty derives its name from the town of Nadvorna, known in Ukrainian as Nadvirna...

 and Kretshniff

Kretshnif (Hasidic dynasty)

Kretshnif is a Hasidic Jewish dynasty that comes from the Nadvorna dynasty....

. He was the son of Rabbi Meyer Rosenbaum

Meyer Rosenbaum

Meyer Rosenbaum may refer to any of these three Hasidic rabbis:* Grand Rabbi Meyer Rosenbaum of Kretchnif, son of Rabbi Mordechai of Nadvorna* Chief Rabbi Meyer Rosenbaum Chief Rabbi of Cuba, son of Rabbi Issamar of Nadvorna...

 (1852 - June 29 1908) of Kretshniff, who in turn was a son of Rabbi Mordechai of Nadvorna

Mordechai of Nadvorna

Rabbi Mordechai Leifer was the son of Rabbi Yesochor Bertche Leifer , author of Sisrei Torah, and a great-great-grandson of Rabbi Meir "The Great" of Premishlan....

 (1824-1894).

Isamar Rosenbaum became a rebbe at the age of fifteen and, at his father's behest, moved to Czernowitz where he served as a chasidic rebbe. In the Nadvorna dynasty, all children of the rebbes open their own chasidic courts, even during their fathers' lifetime. His wife, Rebbitzen Malka, was the daughter of Rebbe Usher Yeshaya Rubin of Kolbuszowa

Kolbuszowa

Kolbuszowa is a small town in south-eastern Poland, with 9,190 inhabitants .Situated in the Subcarpathian Voivodship , it is the capital of Kolbuszowa County.-History:The name of the town comes from the land owner Kolbusz...

, Galicia.

His family was the only chasidic family of grand rabbis known to have all survived the Nazi camps with the whole family intact.

His wife died in 1969. In 1970, three years before his death, he moved from the Washington Heights

Washington Heights, Manhattan

Washington Heights is a New York City neighborhood in the northern reaches of the borough of Manhattan. It is named for Fort Washington, a fortification constructed at the highest point on Manhattan island by Continental Army troops during the American Revolutionary War, to defend the area from the...

 neighborhood of Manhattan

Manhattan

Manhattan is the oldest and the most densely populated of the five boroughs of New York City. Located primarily on the island of Manhattan at the mouth of the Hudson River, the boundaries of the borough are identical to those of New York County, an original county of the state of New York...

 to Yad Eliyahu

Yad Eliyahu

Yad Eliyahu is a neighborhood in the south-east part of Tel Aviv, Israel. The neighborhood was established in 1945 mainly for british army veterans, especially from the local population...

 in Tel Aviv

Tel Aviv

Tel Aviv , officially Tel Aviv-Yafo , is the second most populous city in Israel, with a population of 404,400 on a land area of . The city is located on the Israeli Mediterranean coastline in west-central Israel. It is the largest and most populous city in the metropolitan area of Gush Dan, with...

, Israel

Israel

The State of Israel is a parliamentary republic located in the Middle East, along the eastern shore of the Mediterranean Sea...

.

At the time of his death, he was one of the longest living chassidic rebbes in history; he was known as the Admor Hazaken miNadvorna, or "Elder Rebbe of Nadvorna".

He died at the age of 86 in 1973 and buried on the Mount of Olives

Mount of Olives

The Mount of Olives is a mountain ridge in East Jerusalem with three peaks running from north to south. The highest, at-Tur, rises to 818 meters . It is named for the olive groves that once covered its slopes...

.

All his sons and sons-in-law, were chasidic rebbes, with the sole exception of his son Rabbi Meyer Rosenbaum

Meyer Rosenbaum (II)

Chief Rabbi Meyer Rosenbaum was the spiritual leader of the Kehilla Adath Israel and the Chief Rabbi of Cuba from 1942 to 1958. Rabbi Rosenbaum was the founder of the Tahkemoni School in Havana. He also authored many scholarly works in Hebrew, Yiddish, and Spanish.Chief Rabbi Rosenbaum was a son...

, who was the Chief Rabbi

Chief Rabbi

Chief Rabbi is a title given in several countries to the recognized religious leader of that country's Jewish community, or to a rabbinic leader appointed by the local secular authorities...

 of Cuba

Cuba

The Republic of Cuba is an island nation in the Caribbean. The nation of Cuba consists of the main island of Cuba, the Isla de la Juventud, and several archipelagos. Havana is the largest city in Cuba and the country's capital. Santiago de Cuba is the second largest city...

 and Mexico

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

, and a prolific author of scholarly works, including Torah LeOhr Hatekufah.