Lilya Yur'evna Brik (alternatively spelled Lili or Lily , Russian : Лиля Юрьевна Брик ; 1891 - August 4 , 1978 ) was wife of Osip Brik , muse of Vladimir Mayakovsky , a sister of Elsa Triolet and an author. Pablo Neruda called her a "muse of Russian avant garde ".