the kosintseva sisters, yes sir. good to go
chess siblings and family members ??

9.Donald, Robert Byrne
10.Larry, Ray Kaufman
11.Thomas, Elizabeth Paehtz
12.Oxana, Alexandra Kosteinuk
13.Asuka, Hikaru Nakamura

9.Donald, Robert Byrne
10.Larry, Ray Kaufman
11.Thomas, Elizabeth Paehtz
12.Oxana, Alexandra Kosteinuk
13.Asuka, Hikaru Nakamura
good list

married couples and couples with children count as well so
14.Yury Shulman & Viktorija Ni
15.Daneil Fridman & Anna Zatonski
16.Alexander Yermolinsky & Camilla Baginskaite
17.Natalia Pogonina & husband(dont know his name but I rember reading hes expert level (2000ish)

me and my brother booby fisher
You play chess?
p.s. Boris Spassky's sister, Iraida Spasskaya, was a world class draughts (checkers) player and is a former Soviet Champion for women.

Nadezhda,Tatiana Kosintseva, what a surprise I did not these two beautiful girls were sisters. thanks for feeding my awareness!

Found the answer. The Finegold family is listed twice (both #s 4 and 7)
oops sorry about that

one thing i've learned from this is that the younger siblings tend to be stronger probably because they have there older sibling who they can always practice with till they got as strong as them then surpassed them idk its just intresting that for the most part the younger siblings who are younger by a 2 years or less seem to end up being stronger

I have a brother who is 4 years older than me and i found that chess was one of the few areas where i had the edge over him. Prehaps it is losing to the sibling in other areas which makes a chess player want revenge on the chessboard.
Have you ever played two people related to each other in the same tournament? I played the He twins in Las Vegas, they have similar habits lol, and they are identical, I can barely tell the difference. Daniel captures pieces more elegantly, he takes the piece off the board then replaces it with his own piece, Samuel takes pieces, like touches the piece and knocks over the piece he wants to capture. They both have an annoying habit of looking from your perspective every 5 seconds. I always looked from their perspective whenever they did it to me, I could tell they were irked.
Oh, also in Reno, my coach played FM Bryant and beat him in a nice game, but then got crushed by his stepfather who had come to take REVENGE!
Not in any order and please add im just talking about chess player siblings and family
1.Susan,Juidt,Sofia Polgar
2.Peter D.,Bogdan Lalic
3.Nadezhda,Tatiana Kosintseva
4.Ronald,Mark,Benjamin Finegold
5.Alexi,Alexander Alkhine
6.Berthold,Emmanuel Lasker
7.Ronald,Mark,Ben Finegold
8.Micheal,Jennifer,Gregory Shahade
any other master sibling or family members out there ?