Twins　readily　form　during　growth　or　deformation　in　metals　of　low　stacking-fault　energy.　Fabrication　of　high-density　growth　nanotwins　in　high　stacking-fault　energy　materials　is　technically　challenging.　We　synthesize　nanotwinned　Ni　foils　with　controlled　twin　patterns　pulsed　electrodeposition　produces　conventional　parallel　nanotwins　while　direct　current　electrodeposition　generates　a　new　pattern　of　nanotwins　in　the　parallelogram　form.　The　parallelogram　nanotwins　confine　dislocation　motion　in　the　cage　of　twin　boundaries　and　lead　to　a　superior　strengthening　effect　in　Ni.　(C)　2015　Acta　Materialia　Inc.　Published　by　Elsevier　Ltd.　All　rights　reserved.