Were “all the people ” ​ — not just the Anakim — ​ giants? No. Were the Anakim descendants of the pre - Flood Nephilim?
حَتَّى إِنَّ ٱلشَّعْبَ أَرَادُوا ٱلرُّجُوعَ إِلَى مِصْرَ ،‏ ٱلْأَرْضِ ٱلَّتِي كَانُوا مُسْتَعْبَدِينَ فِيهَا .‏ —‏ عدد ١٣ :‏ ٣١ –‏ ١٤ :‏ ٤‏ .‏