Sayyiduna Jabir (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "You may name yourselves with my name, but do not take my kunyah as your kunyah. I am only 'Qasim' (the one who distributes); I have been sent only to distribute among you."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19322