The right a simplified Tie (Post 91).
The character means that a generation younger than son, or descendant of son.
The bronze script of the character is
Its small seal script is
The clerical script of the character is
Similar to the small seal script, just the Son and the Tie changed to clerical script.
The traditional song typeface is
Which is very similar to clerical script.
The simplified song typeface is
The left is Son, and the right is Small or Young (Post 135). The simplified character changed the right part from Tie to Small or Young, which is good too.
The Pinyin for the character is Sun1.
孙 is a popular family name. Sun Yat-sen, the founder and provisional first president of Republic of China in 1912 right after the Qin Dynasty was turned over, has Sun family name.