I'm really not sure about Sambo, since I'm not very familiar with it, but it's entirely possible. Brazilian 'jiu-jitsu' (their spelling, not mine)
is derived from Japanese jujutsu, despite what some BJJ practitioners claim.
Ran into one 'jiu jitsu' fella who was claiming that ALL martial arts (kung fu, karate, etc) stemmed from 'jiu jitsu'. I didn't have the heart to tell him how wrong he was. Actually, it's been my experience that someone as zealous as he was in his beliefs about his system is usually very close-minded to the facts, no matter how much evidence you can provide them. Unfortunate, but it happens. I tend to not waste my time with them these days.
Once again, it's easy to ferret out the people who don't know from those who do.
"He who knows not and knows that he knows not, he is simple. Teach him.
He who knows not, and knows not that he knows not, he is a fool. Shun him.
He who knows, and knows not that he knows, he is asleep. Awaken him.
He who knows, and knows that he knows, he is wise. Follow him."
Can't remember where I got this from. I'm pretty sure it was an Inosanto JKD book. Go fig.
Cthulhu