LSJ Gloss:πρωτοτόκιαthe rights of the first-born, birthrightDodson:πρωτοτόκιαthe birthrightthe birthright, the rights of the first-born.
Strong's:πρωτοτόκια primogeniture (as a privilege)Derivation: from G4416;KJV Usage: birthright. G4416
TBESG:πρωτοτόκιαbirthrightG:N-N πρωτοτόκια, -ων, τά (< πρωτότοκος) [in LXX (with seel. -εῖα, -εία): Refs Gen.25:31 ff. Gen.27:36, Deu.21:17, 1Ch.5:1 (בְּכוֹרָה) * ;] the rights of the first-born, birthright (= cl. ἡ πρεσβεία): Heb.12:16.† (AS)
πρωτοτόκια prōtotokia pro-tot-ok'-ee-ah From G4416; primogeniture (as a privilege)KJV Usage: birthright.
πρωτοτόκος prōtotokos pro-tot-ok'-os From G4413 and the alternate of G5088; first born (usually as noun, literally or figuratively)KJV Usage: firstbegotten (-born).