Answered May 25th, 2019

Kawhi Leonard has scored 29.8 points per game when getting 9.0+ rebounds per game in the 2019 Eastern Conference Finals.

who was the last player with 29 ppg and 9 rpg in an eastern conference finals
Interpreted as:
Who was the last player with 29 or higher ppg and 9 or higher rpg in an eastern conference finals?
Kawhi LeonardKawhi Leonard2018-19Conference FinalsTORTOR629.89.541.
LeBron JamesLeBron James2017-18Conference FinalsCLECLE733.
LeBron JamesLeBron James2014-15Conference FinalsCLECLE430.311.
LeBron JamesLeBron James2011-12Conference FinalsMIAMIA733.611.
StatMuse has game-level data for rebounds per game going back to the 1963 playoffs.