JSFiddle - React, Tailwind, and code Playground

HTML

<form id="frmGrid">
<table>
    <tr>
        <td>
            <input type="checkbox" name="chkboleto" value="119" checked />
            <input type="hidden" name="hdn_banco" value="001" />
        </td>
        <td>
            <input type="text" name="name" />
        </td>
        <td>
            <input type="text" name="lastname" />
        </td>
    </tr>
    <tr>
        <td>
            <input type="checkbox" name="chkboleto" value="120" />
            <input type="hidden" name="hdn_banco" value="001" />
        </td>
        <td>
            <input type="text" name="name" />
        </td>
        <td>
            <input type="text" name="lastname" />
        </td>
    </tr>
    <tr>
        <td>
            <input type="checkbox" name="chkboleto" value="130" checked />
            <input type="hidden" name="hdn_banco" value="100" />
        </td>
        <td>
            <input type="text" name="name"/>
        </td>
        <td>
            <input type="text" name="lastname" />
        </td>
    </tr>
    <tr>
        <td>
            <input type="checkbox" name="chkboleto" value="140" checked />
            <input type="hidden" name="hdn_banco" value="100" />
        </td>
        <td>
            <input type="text" name="name" />
        </td>
        <td>
            <input type="text" name="lastname" />
        </td>
    </tr>
</table>
</form>

JavaScript

var checked = $('input[type="checkbox"]:checked').map(function(){
   var hidden = $(this).next()[0];
    return {
        checkbox: {name: this.name, value: this.value},
        hidden: {name: hidden.name, value: hidden.value}
    }
}).get();
alert(JSON.stringify(checked, null, 4));