The first birth of the twins among Madri's sons was named Nakula and the next one Sahadeva. The Brahmanas with much pleasure named them thus.
पूर्वजं नकुलेत्येवं सहदेवेति चापरम्। माद्रीपुत्रावकथयंस्ते विप्राः प्रीतमानसाः॥