|Noah Webster's Dictionary|
(n.) The state of being a son, or of bearing the relation of a son; filiation.
Sonship (3 Occurrences)
Romans 8:15 For you did not get the spirit of servants again to put you in fear, but the spirit of sons was given to you, by which we say, Abba, Father. (See RSV NIV)
Romans 9:4 Who are Israelites: who have the place of sons, and the glory, and the agreements with God, and the giving of the law, and the worship, and the hope offered by God: (See RSV)
Galatians 4:5 that he might redeem those under law, that we might receive sonship. (DBY)