The dating clause of a charter dated Nov 1018 refers to the thirtieth year of "principatus domni…Guaimari" and the first year of "principatus domni Guaimari eius filii…principibus". The dating clause of a charter dated Jul 1020 refers to the thirty-second year of "principatus domni Guaimari" and the second year of "principatus domni Guaimarii optato filio…principes". This is the only reference so far found to Prince Guaimar IV having been the adopted son of Prince Guaimar III. It is assumed to be an error. "Guaimarius et Guaimarius…Longobardorum gentis Principes" confirmed the rights of Salerno church, with the consent of "Gaitelgrime Principisse…coniugis nostre", by charter dated May 1023, the dating clause stating that the year was the 35th of "Domni Guaimarii Principis" and the 5th of "Domni Guaimarii eius filio", subscribed by "Gaitelgrimam Guaimarii III uxorem" and "uxorem Guaimarii IV…Gemmam". Amatus records that Guaimar, son of the Prince of Salerno, was captured by the archbishop of Cologne on the orders of Emperor Heinrich II and sent to Pope Benedict [VIII].
The Catalogus Principum Salerni record that "Weimarius alter eius filius [=Weimarius]" succeeded his father as GUAIMAR IV Prince of Salerno and ruled for 34 years and 17 days. The dating clause of two charters dated Jun 1027 and Jul 1027 refer to the ninth year of "principatus domni…Guaimari" and the first year of "principatus domne Gaytelgrime genetrice eius", indicating that Gaitelgrima was appointed co-ruler or regent because of the minority of her son. Orderic Vitalis records that “Drogo quidam Normannus miles” left on pilgrimage to Jerusalem and, on his return, stopped "cum sociis suis Waimalchus dux apud Psalernum", from where he expelled "Sarracenorum" who had been demanding tribute. The dating clause of a charter dated Jan 1038 refers to the twentieth year of "principatus domni…Guaimari" and the first year of "principatus domni Iohanni eius filii". The Catalogus Principum Salerni records that Prince Guaimar IV conquered the duchies of Sorrento and Amalfi, and the principality of Capua. The dating clause of a charter dated Dec 1039 refers to the twenty-second year of "principatus Salerni domni…Guaimari", the second year of "principatus eius Capue" and the first year of "ducatus eius Amalfi et Sirento" enables the dating of these conquests to be estimated precisely: Prince of Capua [1038/early 1039].
Duke of Sorrento [late 1039/1040]. The Chronicon Amalphitani records that "Dominus Guaimarius Princeps Salerni" was installed as Duke of Amalfi in Apr 1039 and ruled for five years and six months. Amatus records that Guaimar was invested as Prince of Capua by Emperor Konrad II (presumably as a confirmation of his acquisition of the principality by conquest), who also made him "his adopted son", on the latter's visit to Italy. The dating clause of a charter dated Apr 1042 refers to the twenty-fourth year of "principatus Guaimari, et quarto principatus eius Capuæ et tertio ducatus Amalphiæ et Sirrenti" and the first year of "Gisulphi filii eius". Prince Guaimar and his son assumed the titles Duke of Apulia and Calabria: the dating clause of a charter dated Jan 1043 refers to the first year of "ducatus illorum Apulie et Calabrie", this title being used for the last time in a charter dated 1047. Amatus records that Prince Guaimar was expelled from Capua in [1047] by Emperor Heinrich III and that the emperor restored Prince Pandolf IV but recaptured the city.
The Annals of Romoald record that "Guaimarius princeps Salerni" was killed "a suis" and succeeded by his son "Gisolfus". The Annales Casinenses record that "Guaimarius princeps" was killed in 1052. The Chronicon Amalphitani records that "Dominus Guaimarius Princeps Salerni" was killed in 1052 after ruling for 23 years. The Chronicon Amalphitani records that "Dominus Guaimarius Princeps Salerni" was killed in 1052 after ruling for 23 years.
The primary sources present considerable difficulty about the wife or wives of Prince Guaimar IV.... [The] only explanation which reconciles all the sources is that the prince married three times, his first and third wives having the same name. However, the possibility cannot be excluded that one or more of these sources is defective in some way and that the information contained in the documents is inaccurate.
Married firstly Gemma, daughter of ---. "Guaimarius et Guaimarius…Longobardorum gentis Principes" confirmed the rights of Salerno church, with the consent of "Gaitelgrime Principisse…coniugis nostre", by charter dated May 1023, the dating clause stating that the year was the thirty-fifth of "Domni Guaimarii Principis" and the fifth of "Domni Guaimarii eius filio", subscribed by "Gaitelgrimam Guaimarii III uxorem" and "uxorem Guaimarii IV…Gemmam". The dating of this document, together with the apparent existence of Prince Guaimar´s supposed second wife Purpura, indicates that it could not refer to Guaimar´s known wife Gemma of Capua and therefore that this Gemma was an otherwise unrecorded first wife.
Married secondy Purpura, daughter of ---. "Dominæ Gaytelgrimæ comitissæ filiæ bonæ recordationis domini Guaimarii…principis et ducis" donated property for the souls of "domini Drogonis et domini Roberti et domini Alfredi comitum qui fuerunt viri sui" and for the souls of "Purpure genitricis suæ et…Ricardi filii sui qui de ipso Roberto comite marito suo primogenitum habuit", by charter dated Jan 1087.... Amatus records that "Guaimar" [which indicates Guaimar IV Prince of Salerno from the context] gave his daughter in marriage to "Drogo…with a very grand dowry". Reading these two sources together, it is assumed that Gaitelgrima was the daughter of Prince Gaimar IV by an otherwise unrecorded marriage to Purpura. One possibility is that the extract from Amatus should have read "sister" instead of "daughter". However, Gaitelgrima is recorded with children from both her second and third marriages which suggests that it is unlikely that Purpura, first wife of Guaimar III Prince of Salerno, was her mother as she died in [1010/11]. 1
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