This legend would seem to show that Rudrasena IV. left no issue and was succeeded by his nephew Siṃhasena. The extreme rarity of Siṃhasena’s coins proves that his reign was very short.
Kshatrapa XXVII. Skanda.The bust and the characters in one other coin show it to be of later date than Siṃhasena. Unfortunately the legend is not clear. Something like the letters राज्ञो क्षत्रपस Rájño Kshatrapasa may be traced in one place and something like पुत्रस स्कन्द Putrasa Skanda in another place. Dr. Bhagvánlál took this to be a Gujarát Kshatrapa of unknown lineage from whom the Kshatrapa dominion passed to the Guptas.
Íśvaradatta, a.d. 230–250.Along with the coins of the regular Kshatrapas coins of a Kshatrapa of unknown lineage named Íśvaradatta have been found in Káthiáváḍa. In general style, in the bust and the corrupt Greek legend on the obverse, and in the form of the old Nágarí legend
Chapter V.
Western Kshatrapas, a.d. 70–398.
Kshatrapa XXVIII. Íśvaradatta, a.d. 230–250. on the reverse, Íśvaradatta’s coins closely resemble those of the fifteenth Kshatrapa Vijayasena (a.d. 238–249). At the same time the text of the Nágarí legend differs from that on the reverse of the Kshatrapa coins by omitting the name of the ruler’s father and by showing in words Íśvaradatta’s date in the year of his own reign. The legend is:
राज्ञो महाक्षत्रपस ईश्वरदत्तस वर्षे प्रथमे,
Rájño Mahákshatrapasa Íśvaradattasa varshe prathame.
In the first year of the king the great Kshatrapa Íśvaradatta.
Most of the recorded coins of Íśvaradatta have this legend. In one specimen the legend is
वर्षे द्वितीये.
Varshe dvitíye.
In the second year.