Light brown eggs at that time would be my Black Sex Link, Iowa Blue (and one lays a round egg) and a mutt (she has Silkie, Bantam Cochin, Leghorn, and something Wheaten in her just by looking at her).
Now for the daddy.
My Welsummer was about 10 weeks old. My splash cochin was pushing 4 months old. Blue Jersey Giants were 4 months old. Big Comb was in there but he is a Silkie cross. The NN were 6 months old. My BCM was 14 weeks old. I have my Blue Wheaten crossbred in there too. The Iowa Blue and Splash Silkie were in there too. From the Picture, #3 almost looks Lavender. I'll need to look at the chickens more tomorrow to see if I can offer any more help. They sure look nice. Did you see the picture of the one I got from you?