How many children did the venerated Mother Mary have after Jesus was born?

The Bible tells us that Jesus had four brothers: James, Joseph, Simon, and Judas ( Matthew 13:55 ). The Bible also tells us that Jesus had sisters, but they are not named or numbered ( Matthew 13:56 ). In John 7:1-10, His brothers go on to the festival while Jesus stays behind.

None. She was a virgin her entire life, as taught by the one Church Jesus Christ founded, to which He promised the fullness of God's truth until the end of time.

Jesus:

 (1.) Born Wednesday, August 21, 7B.C. Mary was 17; Joseph was 22.

 (2.) Returned from Egypt at age 2.5, after Herod died 4B.C.

 (3.) Bar-mizpah 13 years old 21August,7 A.D.

 (4.) Age 14.5, Father, Joseph died from fall while building young Herod's Capitol in Sepphoris.

 (5.) Baptized at noon Monday, January 14, 27A.D. age 32.

 (6.) Official Ministry started at age 33, 27 A.D.

 (7.) Died age 36.5, Friday, 7April30 A.D.

 (8.) Glorified body appeared Sunday, 9April30A.D.

Jesus(oldest); brothers: James, Joseph, Simon, Judas(jude), Amos died at a young age.

Sisters: Miriam, Martha, and Ruth.

Mary's sister, Salome, was mother of James and John zebedee, Jesus' 1st cousins.

It is odd that Bible-Only people can't point to a single verse that says Mary gave birth to anyone else. Nor can they point to a single verse that says "Joseph knew Mary, his wife." They merely assume - aka "make stuff up" - while accusing Catholics of taking liberties with scripture. To answer your question: Mary is the Mother of the Church.

The Blessed Virgin Mary was a perpetual virgin. She did not have any children besides our Lord.

At least six: four named boys and at least two girls (Mt 13:55-56).  And the Bible seems to imply she probably got pregnant with her next child soon after Jesus' birth (emp. added).

Mat 1:24  When Joseph woke up, he did what the Lord's angel told him to do. He married Mary.  25  But Joseph did not have sexual relations with her UNTIL her son was born. And he named him Jesus. 

Until Catholics understand the meaning of the word "until", they'll continue to be confused about Mary's virginity until Jesus was born, until the end of time.

James, Joses, Simon & Judas were born of Mary after Jesus Christ.  There were also some sisters, but the Bible doesn't give their names or say how many where were (Mattew 13:55 & 56)

The bible lists about 3 brothers and and a number of sisters.

No one knows.... one for sure... a brother named James.

Scripture gives us the names of four brothers and also says he had sisters.  Sisters means more than one.  So she must have had at least six children after Jesus was born.