jQuery "Genealogy" plugin

Nicely done aliasing

    jQuery.fn.extend({
        grandchildren: function() {return this.children().children();},
        greatGrandchildren: function() {return this.grandchildren().children();},
        grandparent: function() {return this.parent().parent();},
        greatGrandparent: function() {return this.grandparent().parent();},
        aunts: function() {return this.parent().siblings();},
        prevAunt: function() {return this.parent().prev();},
        prevAunts: function() {return this.parent().prevAll();},
        nextAunt: function() {return this.parent().next();},
        nextAunts: function() {return this.parent().nextAll();},
        cousins: function() {return this.aunts().children();},
        prevCousins: function() {return this.prevAunts().map( 
            function () {return jQuery( this ).children().get().reverse();});},
        nextCousins: function() {return this.nextAunts().children();},
        nieces: function() {return this.siblings().children();},
        prevNieces: function() {return this.prevAll().map( function () {
                return jQuery( this ).children().get().reverse();} );},
        nextNieces: function() {return this.nextAll().children();}
    });

    jQuery.fn.uncles = jQuery.fn.aunts;
    jQuery.fn.prevUncle = jQuery.fn.prevAunt;
    jQuery.fn.prevUncles = jQuery.fn.prevAunts;
    jQuery.fn.nextUncle = jQuery.fn.nextAunt;
    jQuery.fn.nextUncles = jQuery.fn.nextAunts;

    jQuery.fn.nephews = jQuery.fn.nieces;
    jQuery.fn.prevNephews = jQuery.fn.prevNieces;
    jQuery.fn.nextNephews = jQuery.fn.nextNieces;

Hilarious - nice job Ben! I was bemusing in the Khan Academy chat the other day that I always thought it'd be hilarious (although, useful) to have a .uncle() or .aunt() method (for getting .parent().siblings()). Quite amused that Ben put the effort into making this happen.

While this definitely does make things more concise, does it make things clearer? I've never had to deal with overly complex hierarchies like that in JS, so I'm not sure.

Ah yes, but how do I keep track of my firstCousinsTwiceRemoved() ?

(Maybe if I saw the code, I could actually keep straight how those more distant relations work...)

Fine nerd humor!