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The paper is devoted to study the $n$th Hawaiian group $\mathcal{H}_n$, $n\ge 1$, of the wedge sum of two spaces $(X,x_*) = (X_1, x_1) \vee (X_2, x_2)$.  Indeed, we are going to give some versions of the van Kampen theorem forHawaiian groups of the wedge sum of spaces.  First, among some results on Hawaiian groups of semilocally stronglycontractible spaces, we present a structure for the $n$th Hawaiian group of thewedge sum of CW-complexes.  Second, we give more informative structures for the $n$th Hawaiian group ofthe wedge sum $X$, when $X$ is semilocally $n$-simply connected at $x_*$.  Finally, as a consequence, by generalizing the well-known Griffiths space fordimension $n\geq 1$, we give some information about the structure of Hawaiiangroups of Griffiths spaces at any points.

On a Van Kampen Theorem for Hawaiian Groups