The code mentioned above will have compilation issues. However based on the input-output mentioned, the following modification of your code should give you the desired results

package main

import "fmt"

var StringsArray = []string{"Person1", "Person2", "Person3", "Person4", "Person1", "Person2"}

type MyStruct struct {
    Name  string 
    Count int    
}

func main() {
    countArray := []MyStruct{}
    Count := make(map[string]int)
    for _, name := range StringsArray {
        Count[name] += 1
    }

    for name, cnt := range Count {
        countArray = append(countArray, MyStruct{Name: name, Count: cnt})
    }

    fmt.Println(countArray)
}

Playground Link - https://play.golang.org/p/tg4s30w98db

To combine @Dave C and @Sam Toliman's comments

package main

import "fmt"

type MyType struct {
    field string
}

func main() {
    var array [10]MyType

    for idx := range array {
        e := &array[idx]
        e.field = "foo"
    }

    for _, e := range array {
        fmt.Println(e.field)
        fmt.Println("--")
    }
}

https://play.golang.org/p/knKfziB1nce

It was suggested by Mark Mishyn to use slice but there is no reason to create array with make and use in for returned slice of it when array created via literal can be used and it's shorter

for i := range [5]int{} {
        fmt.Println(i)
}