Access $parent's $parent in knockout view - nesting context

Updated for brevity

How can I reference the $parents' $parent in nested Knockout foreach / with bindings?

Example -

    <!-- ko foreach: grandParent -->
        <tr>
            <!-- ko foreach: $parent.parents --> // <-- Doesn't work
                <!-- ko foreach: children -->
                    <td data-bind="if: favToy().name == $parent.$parent.favToy().name">
                        <span data-bind="text: favToy().name"></span>
                    </td>
                <!-- /ko -->
            <!-- /ko -->
        </tr>
    <!-- /ko -->

Original

Sorry for the confusing question but I am trying to reach a second level parent's value to check against a value in the current context (like below) to only show a span if it matches a $parent's $parent's value (ugh!)

    <!-- ko foreach: grandParent -->
        <tr>
            <!-- ko foreach: $parent.parents -->
                <!-- ko foreach: children -->
                    <td data-bind="if: favToy().name == $parent.$parent.favToy().name">
                        <span data-bind="text: favToy().name"></span>
                    </td>
                <!-- /ko -->
            <!-- /ko -->
        </tr>
    <!-- /ko -->

It would be easier to do it this way but from what I have read this is not possible or I am doing it wrong :)

    <!-- ko foreach: grandParent -->
        <tr>
            <!-- ko foreach: $parent.parents -->
                <!-- ko foreach: children ? favToy().name == $parent.$parent.favToy().name -->
                    <td  data-bind="text: favToy().name"></td>
                <!-- /ko -->
            <!-- /ko -->
        </tr>
    <!-- /ko -->

Any help would be greatly appreciated.

Use the $parents array, the grandparent would be $parents[1]. You may also be able to use $root if the grandParent object in your example is the topmost parent.

From the docs:

$parents

This is an array representing all of the parent view models:

$parents[0] is the view model from the parent context (i.e., it’s the same as $parent)

$parents[1] is the view model from the grandparent context

$parents[2] is the view model from the great-grandparent context

… and so on.

$root

This is the main view model object in the root context, i.e., the topmost parent context. It’s usually the object that was passed to ko.applyBindings. It is equivalent to $parents[$parents.length - 1].

You can use $parentContext.$parent.

$parentContext provide many useful properties such as ($data, $parent, $index, ...)