How many of da Isley brothers are still alive?

There are 4 members of The Isley Brothers that are still alive:

Ronald Isley

Ernie Isley

Rudolph Isley

Chris Jasper

And there are 3 members who are already dead:

Vernon Isley - was killed in a bike accident in 1955

O'Kelly Isley - died on March 31, 1986, at the age of 48, from a heart attack

Marvin Isley – died of complications from his diabetes on June 6, 2010

The Isley Brothers is a highly influential, successful and long-running American music group consisting of different line-ups of six brothers, and a brother-in-law, Chris Jasper. The founding members were O'Kelly Isley, Jr., Rudolph Isley, Ronald Isley and Vernon Isley. They are the only act to have at least one Hot 100 hit in each of six consecutive decades: the 1950s, 1960s, 1970s, 1980s, 1990s, and 2000s. The Isleys (as they are commonly called) were inducted to the Rock & Roll Hall of Fame in 1992.

Tip! Find The Isley Brothers bio, music, credits, awards, & streaming radio at AllMusic.

Tuesday, December 06 2016
Source: https://rockhall.com/inductees/the-isley-brothers/bio/