Your search for "Celtic knotwork" revealed the following:
Tribal Heart Tattoo with Celtic Knotwork Design
$ 6.99These entwined hearts use the popular black graphic style of the tribal designs, within the context of traditional Celtic knotwork...
Passion Knotwork Celtic Heart Tattoo Design
$ 5.99A freeform knotwork, colored in the gradient tones of flame to express a passionate heart.
Spiral Couples Lover Tattoo with Celtic Knotwork Design
$ 9.99The request that inspired this original knotwork circle was for a knot that represented a man and his wife forever...
Clover Tattoo with Celtic Knotwork Design
$ 9.99To tell the truth, isn't every other nationality jealous that the symbol of the Irish is the lucky four-leafed clover?