Abstract. We study a family of the Laurent biorthogonal polynomials arising from the Hermite continued fraction for a ratio of two complete elliptic integrals. Recurrence coefficients, explicit expression and the weight function for these polynomials are obtained. We construct also a new explicit example of the Szegö polynomials orthogonal on the unit circle. Relations with associated Legendre polynomials are considered. Vadim Kuznetsov spent a number of years at the Centre de Recherches Mathématiques of the Université de Montréal in the mid-90s. This is when we had the privilege to have him as a colleague and the chance to appreciate his scientif ic and human qualities. His smile, great spirit, penetrating insights and outstanding scientif ic contributions will always be with us.