Thou still hast been the father of good news.

He’s got this reputation for reporting the good stuff. Hurray!
The ambassadors come successfully back! Huzzah!
The Queen has agreed to your proposal of marriage. Hallelujah!
The people have granted you the kingship. Hip hip!
The king is dead. Long live the king! Is Polonius the bearer of good news in general or just for Claudius? And was he in this exalted position with the previous king or did he provide some service to this current one that elevated him to it? I would like to see Polonius’ CV.