In this narration, Hamzah ibn Suhayb (may Allah be pleased with him) reports that `Umar ibn Al-Khattab (may Allah be pleased with him) said to Suhayb (i.e., Suhayb ibn Sinan Ar-Rumi): “Why do you take the Kunyah Abu Yahya when you have no son?” That is, what is the justification for the Kunyah when there is no child? Suhayb (may Allah be pleased with him) said: “The Messenger of Allah (peace and blessings of Allah be upon him) gave me the Kunyah of Abu Yahya.” A Kunyah is a name by which a person is called, such as Abu so-and-so (for males) or Umm so-and-so (for females). His statement, “The Messenger of Allah (peace and blessings of Allah be upon him) gave me the Kunyah of Abu Yahya,” indicates that the validity of a Kunyah does not depend on having a child, as it functions as a proper name. Observing the original literal meaning is not required, and it may be used as a form of expressing optimism (i.e., to receive a child in the future). In the continuation of the narration, it is mentioned that Suhayb (may Allah be pleased with him) was known as Abu Yahya. He would say that he was from among the Arabs, and he would offer abundant food. `Umar (may Allah be pleased with him) said to him: “O Suhayb, why do you take the Kunyah of Abu Yahya when you have no son?” And you say that you are from among the Arabs, and you offer abundant food, is that not extravagance with wealth?" Suhayb (may Allah be pleased with him) said: “The Messenger of Allah (peace and blessings of Allah be upon him) gave me the Kunyah of Abu Yahya. As for your statement regarding lineage, I am a man from the tribe of An-Namir ibn Qasit, from among the people of Mosul. However, I was taken captive as a young boy, and I still remember my family and my people. As for your statement about food, the Messenger of Allah (peace and blessings of Allah be upon him) used to say: ‘The best of you are those who feed others and return the greeting of Salam.’ That is what motivates me to feed others.”This Hadith demonstrates the permissibility of taking a Kunyah even for one who does not have children..