Meaning: The quote "Most redoubted lord and right sovereign cousin, may the Almighty Lord have you in his keeping" is a greeting attributed to Owen Glendower, a prominent figure in Welsh history. The quote reflects the formal and respectful language used in medieval times, conveying reverence and deference to a person of higher status or authority. In this case, Glendower addresses the recipient as a "redoubted lord" and "right sovereign cousin," expressing admiration and acknowledgment of their esteemed position.

Owen Glendower, also known as Owain Glyndŵr in Welsh, was a Welsh ruler and the last native Welshman to hold the title Prince of Wales. He played a significant role in the Welsh struggle for independence during the early 15th century, leading a rebellion against English rule and asserting the sovereignty of Wales. The quote serves as a glimpse into the historical context in which Glendower lived and the formalities of communication within the nobility and ruling class during that time.

The phrase "Most redoubted lord" is a form of address that conveys deep respect and admiration. The word "redoubted" is derived from the Old French word "redouter," meaning to dread or fear, but it was used in a positive sense to denote someone who is highly esteemed and formidable in their authority. By addressing the recipient as a "redoubted lord," Glendower is acknowledging their power and influence while also expressing his deferential regard for them.

The term "right sovereign cousin" further underscores the formal etiquette and hierarchical structure of medieval society. "Sovereign" refers to someone possessing supreme authority and power, while "cousin" in this context likely denotes a familial or political relationship, emphasizing the closeness or kinship between the speaker and the addressed individual. This phrasing reflects the complex web of alliances, allegiances, and familial connections that characterized medieval politics and diplomacy.

The closing phrase, "may the Almighty Lord have you in his keeping," is a benediction or blessing invoking divine protection and guidance. It is a common expression of goodwill and well-wishing, often used to convey sincere hopes for the recipient's safety, prosperity, and well-being. In the context of the quote, it serves as a courteous and reverent way for Glendower to conclude his address to the recipient, emphasizing his earnest desire for their welfare under the watchful care of a higher power.

Overall, the quote captures the formalities and deferential language of medieval communication, as well as the political and social dynamics of the time. It provides insight into the customs of address, expressions of respect, and the religious sensibilities that permeated interactions among the nobility and ruling classes during the era of Owen Glendower. Furthermore, it reflects the nuanced blend of reverence, diplomacy, and faith that characterized the linguistic and cultural landscape of medieval Wales and England.