I'm not positive, but--yes!--I have borrowed fantastic photos my son and brother have taken and posted to social media sites and employed them in my Hubs. So far, so good! It seems to me that if we do it properly with strangers' photos, making sure that we do the professional attribution, it would stand to reason that we can use our own or our loved ones' photos as well. And, yes, I do acknowledge and attribute the photos as being the work of the respective people in my family.
Thanks for asking this pertinent question, rajan jolly! Have a good day, my friend!