FSW stands for Federal skilled worker. It's the program where you get points for your education and experience and the one also with the new rules that you need to have experience in one of 38 "most wanted" occupations to apply or failing that, you need to have a job offer to apply. It has very little to do with family ties although you do get a few extra points for having a close family member in Canada.
There is a federal family sponsorship system but it is very limited in who it allows you to sponsor. You can bring your parents or grandparents but it takes a very long time. You can bring a spouse. You can bring your own or your spouses children if they are under 22 or financially dependent on you. You can bring siblings, nieces and nephews only if they are orphan and under 18. That's pretty much it. You can not bring your uncle or aunt or cousin, you can not bring niece or nephew or sibling over 18 or not orphaned and you can not even bring your children if they are over 22 and working.
There is a clause that says you can bring one other relative if you have no other relatives in Canada but I looked into it before AINP family stream was started and my brother was thinking about maybe coming here but I found out that to qualify for this "one other relative" clause in the federal system, not only could I have no relatives in Canada which I don't but also I could not have any sponsorship eligible relatives anywhere else, even if they were not interested in being sponsored so because my parents are alive, even if they are not interested in coming to Canada at all, that meant that I could not sponsor my brother. Also if I had been able to sponsor my brother, he had to be alone. Since he is married, that too would have stopped me from sponsoring him. Of course I could sponsor him now under AINP but he changed his mind.