Whitney Houston's daughter Bobbi Kristina doesn't want to keep dad Bobby Brown's name

ATLANTA - JUNE 27: ***EXCLUSIVE***  Bobby Brown (L), Whitney Houston and their daughter Bobbi Kristina Watch the premiere of the new show "Being Bobby Brown" on June 27, 2005 in Atlanta, Georgia. (Photo by Sandra Rose/Getty Images)
Whitney Houston's daughter Bobbi Kristina Brown can't stand her name ... because of its association with her father Bobby Brown -- and now, TMZ has learned, she wants to change it all together.

Bobbi Kristina is telling friends ... she's wanted to change her name for years -- ever since her parents split -- but Whitney wouldn't let her.

Now that Whitney's gone, we're told the 19-year-old feels untethered -- and wants to finally change her name completely ... making it simply "Kristina Houston."

We're told Bobbi has made the decision with a sober mind and is in a "better place" than she's been in a while.

It's unclear when she plans to make the change official.