Deformed multi-$Lambda$ hypernuclei are studied within a relativistic mean-field model. In this paper, we take some $N=Z$ hyper isotope chains, i.e., $^{8+n}_{ nLambda}{rm Be}$, $^{20+n}_{ nLambda}{rm Ne}$, and $^{28+n}_{ nLambda}{rm Si}$ systems where $n = 2$, $4$ for Be, and $n = 2$, $8$ for Ne and Si. A sign of two-$^6_{2Lambda}$He cluster structure is observed in the two-body correlation in $^{12}_{4Lambda}$Be. In the Ne hyper isotopes, the deformation is slightly reduced by addition of $Lambda$ hyperons whereas it is significantly reduced or even disappears in the Si hyper isotopes.
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