There are higher dimensional numbers besides complex numbers.  There are also hypercomplex numbers, such as, quaternions (4 D), octonions (8 D), sedenions (16 D), pathions (32 D), chingons (64 D), routons (128 D), voudons (256 D), and so on, without end.  These names were coined by Robert P.C. de Marrais and Tony Smith.  It is an alternate naming system providing relief from the difficult Latin names, such as:
trigintaduonions (32 D),  sexagintaquatronions (64 D), centumduodetrigintanions (128 D), and ducentiquinquagintasexions (256 D).