2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/65374Our main aim is to associate a holonomy Lie groupoid to the connective structure of an abelian gerbe. The construction has analogies with a procedure for the holonomy Lie groupoid of a foliation, in using a locally Lie groupoid and a globalisation procedure. We show that path connections and 2-holonomy on line bundles may be formulated using the notion of a connection pair on a double category, due to Brown-Spencer, but now formulated in terms of double groupoids using the thin fundamental groupoids introduced by Caetano-Mackaay-Picken. To obtain a locally Lie groupoid to which globalisation applies, we use methods of local subgroupoids as developed by Brown-$\dot{\rm I}$çen-Mucuk.10 pages, Latex2EDifferential GeometryCategory Theory18F20, 18F05, 22E99, 58H05text