Ishaq A (Isaac) was a Rasul (Messenger) of Allah (God). He was the younger son of Ibrahim A (Abraham), who is respected equally in all the three major religions of the world - Islam, Christianity and Judaism. All of these three religions emerged from the Middle East.
Rusul (Messengers) of Islam, Christianity and Judaism were all from the family of Ibrahim A (Abraham).

And We bestowed on him [Ibrahim (Abraham)], Ishaq (Isaac) and Ya’qub (Jacob), and We ordained among his offspring Prophethood and the Book [i.e. the Taurat (Torah) (to Musa – Moses), the Injil (Gospel) (to “Isa – Jesus), and the Qur-an (to Muhammad S), all from the offspring of Ibrahim (Abraham)], and We granted him reward in this world; and verily, in the Hereafter he is indeed among the righteous.
Surah (Chapter) Al-Ankabut (The Spider)   The Qur-an 29:27

Ibrahim A (Abraham) began spreading the message of Allah (God) among his people, but they did not agree with him and wanted him to leave their town. 

Ibrahim A (Abraham) migrated (Made Hijrah) from his hometown Ur, with his wife Sarah and his nephew Lut A (Lot), also a Rasul (Messenger) of Allah (God). He stayed in Filastin (Palestine) for some time before moving to Misr (Egypt) to spread the Message of Allah (God).

In the beginning the King of Misr (Egypt) tried to misbehave with his family, but when he found out that Ibrahim A (Abraham) was a Rasul (Messenger) of Allah (God), he repented and sent his daughter Hajar (Hagar) to serve him.

Ibrahim A (Abraham) and his wife Sarah did not have any child after many years of their marriage. Sarah asked Ibrahim A (Abraham) to marry Hajar (Hagar), to get an offspring. Soon after their marriage, Hajar (Hagar) gave birth to a son Isma'il A (Ishmael). Sarah still did not have any child of her own. She began to feel uncomfortable in living with Hajar (Hagar) and her son Isma'il A (Ishmael).

One day Sarah told Ibrahim A (Abraham) that she did not want to live with Hajar (Hagar) and her son Isma'il A (Ishmael), any more. Allah (God) commanded Ibrahim A (Abraham) to take Hajar (Hagar) and Isma'il A (Ishmael) to a far away place. After a long journey, they arrived at the valley of Makkah in Arabia. That was a very hostile place and the valley was completely barren.

Ibrahim A (Abraham) told Hajar (Hagar) that he is leaving them in the valley of Makkah to fulfill the wish of Allah (God). He prayed for the safety of Hajar (Hagar) and Isma'il A (Ishmael) before returning. He prayed to Allah (God) to look after his family before he embarked on his return journey. He left some food and water for Hajar (Hagar) and Isma'il A (Ishmael).

The supply of water exhausted some time after Ibrahim A (Abraham) went back to Sarah. When infant Isma'il A (Ishmael) got very thirsty, his mother Hajar (Hagar) went in search of water. She put Isma'il A (Ishmael) on ground and ran atop a hillock to locate water. When she could not see any source of water from there, she ran down and climbed another nearby hillock. She ran between these two hills several times but could not locate any source of water within the visible distance. In desperation, Hajar (Hagar) prayed to Allah (God) for help.
Allah (God) sent Jibril A (Gabriel), a Malak (Angel) to help them, and made the spring of Zamzam to appear there.

Hajar (Hagar) and Isma'il A (Ishmael) settled near the Zamzam well, in the valley of Makkah. As time went by, they began serving the caravans which passed through that area. The valley of Makkah became a popular stop for the caravans because of water. With time, nomadic tribes, which usually roamed in search of water, settled down near Zamzam. This was the beginning of the city of Makkah. 

Back in Misr (Egypt), Allah (God) sent Mala”ikah (Angels) to give Ibrahim A (Abraham) the good news of his second son.

Has the story reached you, of the honored guests [three angels;
Jibril (Gabriel) along with another two] of Ibrahim (Abraham)?

When they came in to him and said: “Salam, (peace be upon you)!” He
answered: “Salam, (peace be upon you),” and said: “You are a people
unknown to me.”

Then he turned to his household, and brought out a
roasted calf [as the property of Ibrahim (Abraham)
was mainly cows].


And placed it before them, (saying):
“Will you not eat?”


Then he conceived fear of them (when they ate not). They said: “Fear not.” And
they gave him glad tidings of a son having knowledge (about Allah and His
religion of True Monotheism).

Then his wife came forward with a loud voice: she smote her face, and said:
“A barren old woman!”

They said: “Even says so your Lord. Verily, He is the All-Wise,
the All-Knower.”
Surah (Chapter) Adh-Dhariyat (The Winds that Scatter) The Qur-an 51:24-30

Sarah gave birth to Ishaq A (Isaac) when she was quite old.

Allah (God) bestowed His special favors upon his faithful and obedient servant Ibrahim A (Abraham). Both of his sons Isma'il A (Ishmael) and Ishaq A (Isaac) became Rusul (Messengers) of Allah (God).
Many descendents of Ishaq A (Isaac) became Rusul (Messengers) of Allah (God).

Ya'qub A (Jacob), one of the sons of Ishaq A  (Isaac) was also a Rasul (Messenger) of Allah (God). Yusuf A (Joseph), Musa A (Moses), Dawud A (David), Yahya A (John), Sulayman A (Solomon), Ayyub A (Job) and 'Isa A (Jesus) were descendents of Ishaq A  (Isaac).

Descendants of Isma'il A (Ishmael) settled in Arabia. Quraysh and other Arab tribes were from his family. Muhammad S, the last Rasul (Messenger) of Allah (God), was a direct descendant of Isma'il A (Ishmael).

All Rusul (Messengers) of Islam, Christianity, and Judaism were from the family of Ibrahim A (Abraham).