  We give families of knots and links with pairs of Seifert surfaces that are
topologically non-isotopic in $D^4$. This generalizes the main example of
Hayden-Kim-Miller-Park-Sundberg and the proof is similarly based on the double
branched cover and the Seifert form. Moreover, using Conway's theory of
topographs, we implement an algorithm that decides whether two integral
quadratic forms in two variables are isomorphic over $\mathbb Z$.
