  Let $Y$ be an $(m+1)$-dimensional irreducible smooth complex projective
variety embedded in a projective space. Let $Z$ be a closed subscheme of $Y$,
and $\delta$ be a positive integer such that $\mathcal I_{Z,Y}(\delta)$ is
generated by global sections. Fix an integer $d\geq \delta +1$, and assume the
general divisor $X \in |H^0(Y,\ic_{Z,Y}(d))|$ is smooth. Denote by
$H^m(X;\mathbb Q)_{\perp Z}^{\text{van}}$ the quotient of $H^m(X;\mathbb Q)$ by
the cohomology of $Y$ and also by the cycle classes of the irreducible
components of dimension $m$ of $Z$. In the present paper we prove that the
monodromy representation on $H^m(X;\mathbb Q)_{\perp Z}^{\text{van}}$ for the
family of smooth divisors $X \in |H^0(Y,\ic_{Z,Y}(d))|$ is irreducible.
